criyle/codenet-compile-errors huggingface dataset:
Language: C

#include <stdio.h>

bool check(int x)
{
	int a[5], i=0, j;
	while(x)
	{
		a[i++]=x%10;
		x/=10;
	}
	for(j=0; j<i; j++)
		if(a[j]!=a[i-j-1]) break;
	if(i==j) return 1;
	return 0;
}

int main()
{
	int i, a, b, cnt=0;
	scanf("%d%d", &a, &b);
	for(i=a; i<=b; i++)
		if(check(i)) cnt++;
	printf("%d", cnt);
}

Compiler output:
main.c:3:1: error: unknown type name 'bool'
    3 | bool check(int x)
      | ^~~~
main.c:2:1: note: 'bool' is defined in header '<stdbool.h>'; this is probably fixable by adding '#include <stdbool.h>'
    1 | #include <stdio.h>
  +++ |+#include <stdbool.h>
    2 |
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main()
{
    char a,b,c,d,e,f,g,h,i,;
    scanf("%c%c%c",&a,&b,&c);
    getchar();
    scanf("%c%c%c",&d,&e,&f);
    getchar();
    scanf("%c%c%c",&g,&h,&i);
    getchar();
     printf("%c%c%d",a,e,i);
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:28: error: expected unqualified-id before ';' token
    5 |     char a,b,c,d,e,f,g,h,i,;
      |                            ^
Language: C++

#include<iostream>
#include<string>
using namespace std;
int main(){
	srting a;
	cin>>a;
	cout<<a[0];
	cin>>a;
	cout<<a[1];
	cin>>a;
	cout<<a[2];
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:9: error: 'srting' was not declared in this scope
    5 |         srting a;
      |         ^~~~~~
a.cc:6:14: error: 'a' was not declared in this scope
    6 |         cin>>a;
      |              ^
Language: C

#include <stdio.h>

main()
{
    char a[3];
    char b[3];
    char c[3];
    scanf(“%s”, a);
    scanf(“%s”, b);
    scanf(“%s”, c);
    printf(“%s%s%s”, a[0], b[1],c[2]);
}

Compiler output:
main.c:3:1: error: return type defaults to 'int' [-Wimplicit-int]
    3 | main()
      | ^~~~
main.c: In function 'main':
main.c:8:11: error: stray '\342' in program
    8 |     scanf(<U+201C>%s<U+201D>, a);
      |           ^~~~~~~~
main.c:8:12: error: expected expression before '%' token
    8 |     scanf(“%s”, a);
      |            ^
main.c:8:14: error: stray '\342' in program
    8 |     scanf(<U+201C>%s<U+201D>, a);
      |                     ^~~~~~~~
main.c:9:11: error: stray '\342' in program
    9 |     scanf(<U+201C>%s<U+201D>, b);
      |           ^~~~~~~~
main.c:9:12: error: expected expression before '%' token
    9 |     scanf(“%s”, b);
      |            ^
main.c:9:14: error: stray '\342' in program
    9 |     scanf(<U+201C>%s<U+201D>, b);
      |                     ^~~~~~~~
main.c:10:11: error: stray '\342' in program
   10 |     scanf(<U+201C>%s<U+201D>, c);
      |           ^~~~~~~~
main.c:10:12: error: expected expression before '%' token
   10 |     scanf(“%s”, c);
      |            ^
main.c:10:14: error: stray '\342' in program
   10 |     scanf(<U+201C>%s<U+201D>, c);
      |                     ^~~~~~~~
main.c:11:12: error: stray '\342' in program
   11 |     printf(<U+201C>%s%s%s<U+201D>, a[0], b[1],c[2]);
      |            ^~~~~~~~
main.c:11:13: error: expected expression before '%' token
   11 |     printf(“%s%s%s”, a[0], b[1],c[2]);
      |             ^
main.c:11:19: error: stray '\342' in program
   11 |     printf(<U+201C>%s%s%s<U+201D>, a[0], b[1],c[2]);
      |                          ^~~~~~~~
Language: C++

#include<stdio.h>
int main(void)
{
int al1;
int al2;
int al3;
int al4;
int al5;
int al6;
int al7;
int al8;
int al9;

puts("%d%d%d",al1,al5,al9);
}

Compiler output:
a.cc: In function 'int main()':
a.cc:14:5: error: too many arguments to function 'int puts(const char*)'
   14 | puts("%d%d%d",al1,al5,al9);
      | ~~~~^~~~~~~~~~~~~~~~~~~~~~
In file included from a.cc:1:
/usr/include/stdio.h:714:12: note: declared here
  714 | extern int puts (const char *__s);
      |            ^~~~
Language: C++

#include <stdio.h>

int main()
{
	int i;
	char a[4];
	for(i=0; i<3; i++)
	{
		gets(a);
		printf("%c", a[i]);
	}
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:17: error: 'gets' was not declared in this scope; did you mean 'getw'?
    9 |                 gets(a);
      |                 ^~~~
      |                 getw
Language: C++

int main(void){
char hoge[3][3]={0},var[3]={0};
scanf("%s",hoge[0]);
scanf("%s",hoge[1]);
scanf("%s",hoge[2]);

var[0]=hoge[0][0];
var[1]=hoge[1][1];
var[2]=hoge[2][2];
printf("%s",var);
return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:3:1: error: 'scanf' was not declared in this scope
    3 | scanf("%s",hoge[0]);
      | ^~~~~
a.cc:10:1: error: 'printf' was not declared in this scope
   10 | printf("%s",var);
      | ^~~~~~
a.cc:1:1: note: 'printf' is defined in header '<cstdio>'; this is probably fixable by adding '#include <cstdio>'
  +++ |+#include <cstdio>
    1 | int main(void){
Language: C++

#include<bits/stdc++.h>
using namespace std;
  int main(){
  string abc,a;
  cin>>abc;
  cout<<abc[0]abc[4]abc[8]<<endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:15: error: expected ';' before 'abc'
    6 |   cout<<abc[0]abc[4]abc[8]<<endl;
      |               ^~~
      |               ;
Language: C++

#include <stdio.h>
int main(){
char a[3][4];
for(int k=0;k<3;k++){
for(int l=0;l<4:++){
scanf("%c",&a[k][l]);
}
}

printf("%c",a[0][0]);
printf("%c",a[1][1]);
printf("%c",a[2][2]);


return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:5:13: warning: range-based 'for' loops with initializer only available with '-std=c++20' or '-std=gnu++20' [-Wc++20-extensions]
    5 | for(int l=0;l<4:++){
      |             ^
a.cc:5:16: error: expected ';' before ':' token
    5 | for(int l=0;l<4:++){
      |                ^
      |                ;
a.cc:8:1: error: expected primary-expression before '}' token
    8 | }
      | ^
a.cc:7:2: error: expected ';' before '}' token
    7 | }
      |  ^
      |  ;
    8 | }
      | ~ 
a.cc:8:1: error: expected primary-expression before '}' token
    8 | }
      | ^
a.cc:7:2: error: expected ')' before '}' token
    7 | }
      |  ^
      |  )
    8 | }
      | ~ 
a.cc:5:4: note: to match this '('
    5 | for(int l=0;l<4:++){
      |    ^
a.cc:8:1: error: expected primary-expression before '}' token
    8 | }
      | ^
Language: C

include <stdio.h>

main()
{
    char a[3];
    char b[3];
    char c[3];
    scanf(“%s”, a);
    scanf(“%s”, b);
    scanf(“%s”, c);
    printf(“%s%s%s”, a[0], b[1],c[2]);
}

Compiler output:
main.c:1:9: error: expected '=', ',', ';', 'asm' or '__attribute__' before '<' token
    1 | include <stdio.h>
      |         ^
main.c:8:11: error: stray '\342' in program
    8 |     scanf(<U+201C>%s<U+201D>, a);
      |           ^~~~~~~~
main.c:8:14: error: stray '\342' in program
    8 |     scanf(<U+201C>%s<U+201D>, a);
      |                     ^~~~~~~~
main.c:9:11: error: stray '\342' in program
    9 |     scanf(<U+201C>%s<U+201D>, b);
      |           ^~~~~~~~
main.c:9:14: error: stray '\342' in program
    9 |     scanf(<U+201C>%s<U+201D>, b);
      |                     ^~~~~~~~
main.c:10:11: error: stray '\342' in program
   10 |     scanf(<U+201C>%s<U+201D>, c);
      |           ^~~~~~~~
main.c:10:14: error: stray '\342' in program
   10 |     scanf(<U+201C>%s<U+201D>, c);
      |                     ^~~~~~~~
main.c:11:12: error: stray '\342' in program
   11 |     printf(<U+201C>%s%s%s<U+201D>, a[0], b[1],c[2]);
      |            ^~~~~~~~
main.c:11:19: error: stray '\342' in program
   11 |     printf(<U+201C>%s%s%s<U+201D>, a[0], b[1],c[2]);
      |                          ^~~~~~~~
Language: C++

#include <stdio.h>
int main(){
char a[3][4];
for(int k=0;k<3;k++){
for(int l=0;l<4:++){
scanf("%c",&a[k][l]);
}

printf("%c",a[0][0]);
printf("%c",a[1][1]);
printf("%c",a[2][2]);


return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:5:13: warning: range-based 'for' loops with initializer only available with '-std=c++20' or '-std=gnu++20' [-Wc++20-extensions]
    5 | for(int l=0;l<4:++){
      |             ^
a.cc:5:16: error: expected ';' before ':' token
    5 | for(int l=0;l<4:++){
      |                ^
      |                ;
a.cc:10:21: error: expected ')' before ';' token
   10 | printf("%c",a[1][1]);
      |                     ^
      |                     )
a.cc:5:4: note: to match this '('
    5 | for(int l=0;l<4:++){
      |    ^
a.cc:15:2: error: expected '}' at end of input
   15 | }
      |  ^
a.cc:2:11: note: to match this '{'
    2 | int main(){
      |           ^
Language: C++

#include<bits/stdc++.h>
using namespace std
  int main(){
  string abc,a;
  cin>>abc;
  cout<<abc[0]abc[4]abc[8]<<endl;
  return 0;
}

Compiler output:
a.cc:2:20: error: expected ';' before 'int'
    2 | using namespace std
      |                    ^
      |                    ;
    3 |   int main(){
      |   ~~~               
a.cc: In function 'int main()':
a.cc:6:15: error: expected ';' before 'abc'
    6 |   cout<<abc[0]abc[4]abc[8]<<endl;
      |               ^~~
      |               ;
Language: C

include <stdio.h>

main()
{
    char a[4];
    char b[4];
    char c[4];
    scanf(“%s”, a);
    scanf(“%s”, b);
    scanf(“%s”, c);
    printf(“%s%s%s”, a[0], b[1],c[2]);
}

Compiler output:
main.c:1:9: error: expected '=', ',', ';', 'asm' or '__attribute__' before '<' token
    1 | include <stdio.h>
      |         ^
main.c:8:11: error: stray '\342' in program
    8 |     scanf(<U+201C>%s<U+201D>, a);
      |           ^~~~~~~~
main.c:8:14: error: stray '\342' in program
    8 |     scanf(<U+201C>%s<U+201D>, a);
      |                     ^~~~~~~~
main.c:9:11: error: stray '\342' in program
    9 |     scanf(<U+201C>%s<U+201D>, b);
      |           ^~~~~~~~
main.c:9:14: error: stray '\342' in program
    9 |     scanf(<U+201C>%s<U+201D>, b);
      |                     ^~~~~~~~
main.c:10:11: error: stray '\342' in program
   10 |     scanf(<U+201C>%s<U+201D>, c);
      |           ^~~~~~~~
main.c:10:14: error: stray '\342' in program
   10 |     scanf(<U+201C>%s<U+201D>, c);
      |                     ^~~~~~~~
main.c:11:12: error: stray '\342' in program
   11 |     printf(<U+201C>%s%s%s<U+201D>, a[0], b[1],c[2]);
      |            ^~~~~~~~
main.c:11:19: error: stray '\342' in program
   11 |     printf(<U+201C>%s%s%s<U+201D>, a[0], b[1],c[2]);
      |                          ^~~~~~~~
Language: C++

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int i,j;
    char a[4][4];
    for(i=0;i<3;i++)
    {
        gets(a[i]);
    }
    for(i=0;i<3;i++)
    {
        printf("%c",a[i][i]);
    }
    printf("\n");

    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:9: error: 'gets' was not declared in this scope; did you mean 'getw'?
   10 |         gets(a[i]);
      |         ^~~~
      |         getw
Language: C++

#include <math.h>
#include <algorithm>
using namespace std;
int main()
{
	int i,j,n;
	int a,b;
	char x[5][5];
	for(i = 0; i <= 2; i++)
	{
		scanf("%s", x[i]);
	}
	printf("%c%c%c\n",x[0][0],x[1][1],x[2][2]);
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:17: error: 'scanf' was not declared in this scope
   11 |                 scanf("%s", x[i]);
      |                 ^~~~~
a.cc:13:9: error: 'printf' was not declared in this scope
   13 |         printf("%c%c%c\n",x[0][0],x[1][1],x[2][2]);
      |         ^~~~~~
a.cc:3:1: note: 'printf' is defined in header '<cstdio>'; this is probably fixable by adding '#include <cstdio>'
    2 | #include <algorithm>
  +++ |+#include <cstdio>
    3 | using namespace std;
Language: C++

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int i;
    char a[4][4];
    for(i=0;i<3;i++)
    {
        gets(a[i]);
    }
    for(i=0;i<3;i++)
    {
        printf("%c",a[i][i]);
    }

    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:9: error: 'gets' was not declared in this scope; did you mean 'getw'?
   10 |         gets(a[i]);
      |         ^~~~
      |         getw
Language: C

include <studio.h>

main()
{
    char a[4];
    char b[4];
   char c[4];
    scanf(“%s”, a);
    scanf(“%s”, b);
    scanf(“%s”, c);
    printf(“%s%s%s”, a[0], b[1],c[2]);
}

Compiler output:
main.c:1:9: error: expected '=', ',', ';', 'asm' or '__attribute__' before '<' token
    1 | include <studio.h>
      |         ^
main.c:8:11: error: stray '\342' in program
    8 |     scanf(<U+201C>%s<U+201D>, a);
      |           ^~~~~~~~
main.c:8:14: error: stray '\342' in program
    8 |     scanf(<U+201C>%s<U+201D>, a);
      |                     ^~~~~~~~
main.c:9:11: error: stray '\342' in program
    9 |     scanf(<U+201C>%s<U+201D>, b);
      |           ^~~~~~~~
main.c:9:14: error: stray '\342' in program
    9 |     scanf(<U+201C>%s<U+201D>, b);
      |                     ^~~~~~~~
main.c:10:11: error: stray '\342' in program
   10 |     scanf(<U+201C>%s<U+201D>, c);
      |           ^~~~~~~~
main.c:10:14: error: stray '\342' in program
   10 |     scanf(<U+201C>%s<U+201D>, c);
      |                     ^~~~~~~~
main.c:11:12: error: stray '\342' in program
   11 |     printf(<U+201C>%s%s%s<U+201D>, a[0], b[1],c[2]);
      |            ^~~~~~~~
main.c:11:19: error: stray '\342' in program
   11 |     printf(<U+201C>%s%s%s<U+201D>, a[0], b[1],c[2]);
      |                          ^~~~~~~~
Language: C++

#include <stdio.h>
int main(){
char a[3][3];
for(int k=0;k<3;k++){
for(int l=0;l<3;l++){
scamf("%s",&a[k][l]);
}
}
printf("%s",a[1][1]);
printf("%s",a[2][2]);

printf("%s",a[3][3]);
return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:1: error: 'scamf' was not declared in this scope; did you mean 'scanf'?
    6 | scamf("%s",&a[k][l]);
      | ^~~~~
      | scanf
Language: Java

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class A
{
  
  public static void main(String[] args) throws IOException
  {
    BufferedReader r = new BufferedReader(new InputStreamReader(System.in), 1);
    String s1 = r.readLine();
    String s2 = r.readLine();
    String s3 = r.readLine();
    
    System.out.print(s1.charAt(0));
    System.out.print(s2.charAt(1));
    System.out.print(s3.charAt(2));
  }
  
}

Compiler output:
Main.java:5: error: class A is public, should be declared in a file named A.java
public class A
       ^
1 error
Language: C++

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class A
{
  
  public static void main(String[] args) throws IOException
  {
    BufferedReader r = new BufferedReader(new InputStreamReader(System.in), 1);
    String s1 = r.readLine();
    String s2 = r.readLine();
    String s3 = r.readLine();
    
    System.out.print(s1.charAt(0));
    System.out.print(s2.charAt(1));
    System.out.print(s3.charAt(2));
  }
  
}

Compiler output:
a.cc:1:1: error: 'import' does not name a type
    1 | import java.io.BufferedReader;
      | ^~~~~~
a.cc:1:1: note: C++20 'import' only available with '-fmodules-ts'
a.cc:2:1: error: 'import' does not name a type
    2 | import java.io.IOException;
      | ^~~~~~
a.cc:2:1: note: C++20 'import' only available with '-fmodules-ts'
a.cc:3:1: error: 'import' does not name a type
    3 | import java.io.InputStreamReader;
      | ^~~~~~
a.cc:3:1: note: C++20 'import' only available with '-fmodules-ts'
a.cc:5:1: error: expected unqualified-id before 'public'
    5 | public class A
      | ^~~~~~
Language: C++

#include<string>
#include<string.h>
#include<map>
#include<set>
#include<vector>
#include<stdio.h>
#include<math.h>
#include<iostream>
#include<algorithm>
#include<queue>
using namespace std;
char c[5][5];
int main()
{
  for(int i=0;i<3;i++)
    for(int j=0;j<3;j++)
      cin>>c[i][j];
  cout<<a[0][0]<<" "<<a[1][1]<<" "<<a[2][2]; 
  system("pause");
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:18:9: error: 'a' was not declared in this scope
   18 |   cout<<a[0][0]<<" "<<a[1][1]<<" "<<a[2][2];
      |         ^
Language: C++

#include <algorithm>
#include <iostream>
#include <string.h>
#include <stdio.h>
#include <vector>
#include <queue>
#include <cmath>
#include <map>
#include <set>

#define pii pair <int, int>
#define pb push_back
#define ll long long
#define ss second
#define ff first
#define N 100010

using namespace std;

char c[5][5];

int main()
{
	for(int i = 1; i <= 3; i++)
		for(int h = 1; h <= 3; h++)
			cin >> c[i][h];
	
	for(int i = 1; i <= 3; i++)
		cout << c[i][h];
}

Compiler output:
a.cc: In function 'int main()':
a.cc:29:30: error: 'h' was not declared in this scope
   29 |                 cout << c[i][h];
      |                              ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define array_input int n;cin>>n;int a[n+1],i;for(i=1;i<=n;i++){cin>>a[i];}
#define array_output for(i=1;i<=n;i++){cout<<a[i]<<" ";}cout<<endl;
#define INF 2147483647
#define long_INF 18446744073709551615
typedef long long ll;
typedef unsigned int uint;
typedef unsigned long long ull;
typedef long double ld;
const double pi=acos(-1);
const double eps=1e-6;

int main()
{
	ios::sync_with_stdio(false);
	string s1,s2,s3;
	cin>>s1>>s2>>s3;
	cout<<s1[0]<<s2[1]<<s3[2]<<endl;
	return 0;
}
#include <bits/stdc++.h>
using namespace std;
#define array_input int n;cin>>n;int a[n+1],i;for(i=1;i<=n;i++){cin>>a[i];}
#define array_output for(i=1;i<=n;i++){cout<<a[i]<<" ";}cout<<endl;
#define INF 2147483647
#define long_INF 18446744073709551615
typedef long long ll;
typedef unsigned int uint;
typedef unsigned long long ull;
typedef long double ld;
const double pi=acos(-1);
const double eps=1e-6;

int main()
{
	ios::sync_with_stdio(false);
	string s1,s2,s3;
	cin>>s1>>s2>>s3;
	cout<<s1[0]<<s2[1]<<s3[2]<<endl;
	return 0;
}


Compiler output:
a.cc:32:14: error: redefinition of 'const double pi'
   32 | const double pi=acos(-1);
      |              ^~
a.cc:11:14: note: 'const double pi' previously defined here
   11 | const double pi=acos(-1);
      |              ^~
a.cc:33:14: error: redefinition of 'const double eps'
   33 | const double eps=1e-6;
      |              ^~~
a.cc:12:14: note: 'const double eps' previously defined here
   12 | const double eps=1e-6;
      |              ^~~
a.cc:35:5: error: redefinition of 'int main()'
   35 | int main()
      |     ^~~~
a.cc:14:5: note: 'int main()' previously defined here
   14 | int main()
      |     ^~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;

int digit(int C, int d);
int f(int C);

int A, B, j=0;

int main() {
  cin >> A >> B;
  times = B-A+1;
  for (int i=0; i<times; A++){
    j += f(A);
  }
  cout << j << endl;
}

int digit(int C, int d){
  int x=0, y=1;
  for(int i=0; i<d; i++){
    x = (C%(y*10) -x)/y;
    y *= 10;
  }
  return x;
}

int f(int C){
  bool i;
  if(digit(C, 1) == digit(C, 5) && digit(C, 2) == digit(C, 4)){
    i = 1;
  } else {
    i = 0;
  }
  return i;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:3: error: 'times' was not declared in this scope; did you mean 'timex'?
   11 |   times = B-A+1;
      |   ^~~~~
      |   timex
Language: C++

#include <bits/stdc++.h>
using namespace std;

int digit(int C, int d);
int f(int C);

int A, B, j=0;

int main() {
  cin >> A >> B;
  for (A; A<B+1; A++;){
    j += f(A);
  }
  cout << j << endl;
}

int digit(int C, int d){
  int x=0, y=1;
  for(int i=0; i<d; i++){
    x = (C%(y*10) -x)/y;
    y *= 10;
  }
  return x;
}

int f(int C){
  bool i;
  if(digit(C, 1) == digit(C, 5) && digit(C, 2) == digit(C, 4)){
    i = 1;
  } else {
    i = 0;
  }
  return i;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:21: error: expected ')' before ';' token
   11 |   for (A; A<B+1; A++;){
      |       ~             ^
      |                     )
a.cc:11:22: error: expected primary-expression before ')' token
   11 |   for (A; A<B+1; A++;){
      |                      ^
Language: C++

#include <bits/stdc++.h>
using namespace std;

int digit(int C, int d);
int f(int C);

int A, B, j=0;

int main() {
  cin >> A >> B;
  for (A<B+1; A++){
    j += f(A);
  }
  cout << j << endl;
}

int digit(int C, int d){
  int x=0, y=1;
  for(int i=0; i<d; i++){
    x = (C%(y*10) -x)/y;
    y *= 10;
  }
  return x;
}

int f(int C){
  bool i;
  if(digit(C, 1) == digit(C, 5) && digit(C, 2) == digit(C, 4)){
    i = 1;
  } else {
    i = 0;
  }
  return i;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:18: error: expected ';' before ')' token
   11 |   for (A<B+1; A++){
      |                  ^
      |                  ;
Language: C++

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

int main()
{
    int n,m,ans=0;
    cin >> n >> m;
    string s;
    for(int i=n; i<=m; i++)
    {
        s=to_string(i);
        if(c[0]==c[4]&&c[1]==c[3])
            ans++;
    }
    cout << ans << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:15:12: error: 'c' was not declared in this scope
   15 |         if(c[0]==c[4]&&c[1]==c[3])
      |            ^
Language: C

#include<bits/stdc++.h>
using namespace std;
int main()
{
int a,b,p=0,c=0;
cin>>a>>b;
for(int i=a;i<=b;i++)
{
int x=i;
while(x>0)
{
p=p*10+(x%10);
x=x/10;
}
if(p==i)
{
c++;
}
p=0;
}
cout<<c<<endl;
return 0;
}

Compiler output:
main.c:1:9: fatal error: bits/stdc++.h: No such file or directory
    1 | #include<bits/stdc++.h>
      |         ^~~~~~~~~~~~~~~
compilation terminated.
Language: Java

import java.util.Scanner;
import java.util.stream.IntStream;

public class ProblemB {

	/** 最大値 */
	private static final int MAX = 100_000;

	public static void main(String[] args) {
		try (Scanner scanner = new Scanner(System.in)) {
			int[] count = new int[MAX];
			count[0] = 0;
			IntStream.range(1, MAX).forEach(i -> count[i] = count[i - 1] + (isPalindromic(i) ? 1 : 0));
			int a = scanner.nextInt(), b = scanner.nextInt();
			System.out.println(count[b] - count[a - 1]);
		}
	}

	/**
	 * 入力数字の10進数表現は回文かどうかを計算
	 * 
	 * @param n 入力数字
	 * @return 入力数字の10進数表現は回文かどうか
	 */
	private static boolean isPalindromic(int n) {
		char[] s = String.valueOf(n).toCharArray();
		for (int i = 0; i < s.length / 2; i++) {
			if (s[i] != s[s.length - 1 - i]) {
				return false;
			}
		}
		return true;
	}
}


Compiler output:
Main.java:4: error: class ProblemB is public, should be declared in a file named ProblemB.java
public class ProblemB {
       ^
1 error
Language: C

#include<bits/stdc++.h>
using namespace std;

int main(){

    int a,b;
    cin >> a >> b;
    int sum = 0;
    for (int i = a; i < b + 1; i++){
        int c_1 = i / 10000;
        int c_2 = (i % 10000) / 1000;
        int c_3 = (i % 100) / 10;
        int c_4 = i % 10;
        if (c_1 == c_4 && c_2 == c_3){
            sum++;
        }
    }
    cout << sum << endl;
}

Compiler output:
main.c:1:9: fatal error: bits/stdc++.h: No such file or directory
    1 | #include<bits/stdc++.h>
      |         ^~~~~~~~~~~~~~~
compilation terminated.
Language: C++

#include <bits/stdc++.h>
using namespace std;

int main (){
  int A,B;
  cin >> A >> B;
 
  int counta = 0;
  int countb = 0;
  
  for(int p = 10000;p < A; p++) {
    int a,b,c,d,e;
    a = p/10000;
    b = p/1000-a;
    c = p/100-10*a-b;
    d = p/10-100*a-10*b-c;
    e = p-1000*a-100*b-10*c-d;
    if (a==e && b==d) {
      counta++;
    }
  }
  
  for(int q = 10000;q <= B; q++) {
    char f,g,h,i,j;
    f = q.at(0);
    g = q.at(1);
    h = q.at(2);
    i = q.at(3);
    j = q.at(4);
    if (j==f && g==i) {
      countb++;
    }
  }
   cout << countb - counta << endl;
}
   
  
  


Compiler output:
a.cc: In function 'int main()':
a.cc:25:11: error: request for member 'at' in 'q', which is of non-class type 'int'
   25 |     f = q.at(0);
      |           ^~
a.cc:26:11: error: request for member 'at' in 'q', which is of non-class type 'int'
   26 |     g = q.at(1);
      |           ^~
a.cc:27:11: error: request for member 'at' in 'q', which is of non-class type 'int'
   27 |     h = q.at(2);
      |           ^~
a.cc:28:11: error: request for member 'at' in 'q', which is of non-class type 'int'
   28 |     i = q.at(3);
      |           ^~
a.cc:29:11: error: request for member 'at' in 'q', which is of non-class type 'int'
   29 |     j = q.at(4);
      |           ^~
Language: C++

#include <bits/stdc++.h>
using namespace std;

int main (){
  int A,B;
  cin >> A >> B;
 
  int counta = 0;
  int countb = 0;
  
  for(int p = 10000;p < A; p++) {
    int a,b,c,d,e;
    a = p/10000;
    b = p/1000-a;
    c = p/100-10*a-b;
    d = p/10-100*a-10*b-c;
    e = p-1000*a-100*b-10*c-d;
    if (a==e && b==d) {
      counta++;
    }
  }
  
  for(int q = 10000;q <= B; q++) {
    char f,g,h,i,j;
    f = p.at(0);
    g = p.at(1);
    h = p.at(2);
    i = p.at(3);
    j = p.at(4);
    if (j==f && g==i) {
      countb++;
    }
  }
   cout << countb - counta << endl;
}
   
  
  


Compiler output:
a.cc: In function 'int main()':
a.cc:25:9: error: 'p' was not declared in this scope
   25 |     f = p.at(0);
      |         ^
Language: C++

#include <bits/stdc++.h>
using namespace std;

int main (){
  int A,B;
  cin >> A >> B;
  char f,g,h,i,j;
  f = B.at(0);
  g = B.at(1);
  h = B.at(2);
  i = B.at(3);
  j = B.at(4);
  int counta = 0;
  int countb = 0;
  
  for(int p = 10000;p < A; p++) {
    char a,b,c,d,e;
    a = p.at(0);
    b = p.at(1);
    c = p.at(2);
    d = p.at(3);
    e = p.at(4);
    if (a=e && b=d) {
      counta++;
    }
  }
  
  for(int q = 10000;q <= B; q++) {
    char f,g,h,i,j;
    f = B.at(0);
    g = B.at(1);
    h = B.at(2);
    i = B.at(3);
    j = B.at(4);
    if (j=f && g=i) {
      countb++;
    }
  }
   cout << countb - counta << endl;
}
   
  
  


Compiler output:
a.cc: In function 'int main()':
a.cc:8:9: error: request for member 'at' in 'B', which is of non-class type 'int'
    8 |   f = B.at(0);
      |         ^~
a.cc:9:9: error: request for member 'at' in 'B', which is of non-class type 'int'
    9 |   g = B.at(1);
      |         ^~
a.cc:10:9: error: request for member 'at' in 'B', which is of non-class type 'int'
   10 |   h = B.at(2);
      |         ^~
a.cc:11:9: error: request for member 'at' in 'B', which is of non-class type 'int'
   11 |   i = B.at(3);
      |         ^~
a.cc:12:9: error: request for member 'at' in 'B', which is of non-class type 'int'
   12 |   j = B.at(4);
      |         ^~
a.cc:18:11: error: request for member 'at' in 'p', which is of non-class type 'int'
   18 |     a = p.at(0);
      |           ^~
a.cc:19:11: error: request for member 'at' in 'p', which is of non-class type 'int'
   19 |     b = p.at(1);
      |           ^~
a.cc:20:11: error: request for member 'at' in 'p', which is of non-class type 'int'
   20 |     c = p.at(2);
      |           ^~
a.cc:21:11: error: request for member 'at' in 'p', which is of non-class type 'int'
   21 |     d = p.at(3);
      |           ^~
a.cc:22:11: error: request for member 'at' in 'p', which is of non-class type 'int'
   22 |     e = p.at(4);
      |           ^~
a.cc:23:13: error: lvalue required as left operand of assignment
   23 |     if (a=e && b=d) {
      |           ~~^~~~
a.cc:30:11: error: request for member 'at' in 'B', which is of non-class type 'int'
   30 |     f = B.at(0);
      |           ^~
a.cc:31:11: error: request for member 'at' in 'B', which is of non-class type 'int'
   31 |     g = B.at(1);
      |           ^~
a.cc:32:11: error: request for member 'at' in 'B', which is of non-class type 'int'
   32 |     h = B.at(2);
      |           ^~
a.cc:33:11: error: request for member 'at' in 'B', which is of non-class type 'int'
   33 |     i = B.at(3);
      |           ^~
a.cc:34:11: error: request for member 'at' in 'B', which is of non-class type 'int'
   34 |     j = B.at(4);
      |           ^~
a.cc:35:13: error: lvalue required as left operand of assignment
   35 |     if (j=f && g=i) {
      |           ~~^~~~
Language: C++

A,B= map(int,input().split())

ans=0

for i in range(A,B+1):
    for j in range(len(str(i))):
        zen = j
        kou = len(str(i))-1-j
        if zen >= kou:
            ans+=1
            break
        if str(i)[zen] != str(i)[kou]:
            break
    
print(ans)

Compiler output:
a.cc:1:1: error: 'A' does not name a type
    1 | A,B= map(int,input().split())
      | ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int n,k,a=0;
  cin>>n>>k;    
  
  int a=n/100,b=k/100;
  int c=b-a-1;
  
  int aaf=n/10000,aab=(n-aaf*10000)/1000;
  int bbf=k/10000,bbb=(k-bbf*10000)/1000;
  int af=(n-a*100)/10,ab=n-a*100-af;
  int bf=(k-b*100)/10,bb=k-b*100-bf;
    
  if(af+aaf<ab+aab){
    c+=1;
  }
  if(bf+bbf>bb+bbb){
    c+=1;
  }
   
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:7: error: redeclaration of 'int a'
    8 |   int a=n/100,b=k/100;
      |       ^
a.cc:5:11: note: 'int a' previously declared here
    5 |   int n,k,a=0;
      |           ^
Language: C++

#include <bits/stdc++.h>
using namespace std;

int main() {
  int A, B;
  cin >> A >> B;
  int res = 0;
  for (int i = A; i <= B; i++) {
    if (i/10000 == i%10  && i/1000%10 == i%100/10) {
      res += 1;
      i += 9
    }
  }
  cout << res << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:13: error: expected ';' before '}' token
   11 |       i += 9
      |             ^
      |             ;
   12 |     }
      |     ~
Language: C++

#include<bits/stdc++.h>
using namespace std;

int main(){
  int a, b, ans = 0;
  cin >> a >> b;
  while(a < b){
    if(i/10000==i%10&&(i/1000-(i/10000)*10)==(i%100-i%10)/10){
      ans++;
    }
    a++;
  }
  cout << ans;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:8: error: 'i' was not declared in this scope
    8 |     if(i/10000==i%10&&(i/1000-(i/10000)*10)==(i%100-i%10)/10){
      |        ^
Language: C++

#include <bits/stdc++.h>
using namespace std;

int main() {
 int A,B;
 cin >> A >> B;
  
 int count = 0;
 
 for (int i = A; i <= B; i++) {
   int a1 = i % 10;
   int a10 = (i / 10) % 10;
   int a1000 = (i / 1000) % 10;
   int a10000 = i / 10000;
   
   if (a1 = a10000 && a10 = a1000) {
    count++;
   }
 }
  
  cout << count << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:16:20: error: lvalue required as left operand of assignment
   16 |    if (a1 = a10000 && a10 = a1000) {
      |             ~~~~~~~^~~~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;

int main() {
  int a, b, z;
  cin >> a >> b;
  z = a;
  int count = 0
  while (z <= b) {
    int zin = z;
    int k1 = zin / 10000;
    int zin1 = zin % 10000;
    int k2 = zin1 / 1000;
    int zin2 = zin1 % 1000;
    int k3 = zin2 / 100;
    int zin3 = zin2 % 100;
    int k4 = zin3 / 10;
    int zin4 = zin3 % 10;
    int k5 = zin4;
    if (k1 == k5) { 
      if (k2 == k4) {
        count++;
      }
    }
  z++;
  }
  cout << count << endl; 
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:3: error: expected ',' or ';' before 'while'
    9 |   while (z <= b) {
      |   ^~~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main (){
  int a,b,d,e,A,B,N;
  cin>>A>>B;
  N=0;
  for(i=A;i<B+1;i++){
    a=i%10;
    b=(i/10)%10;
    d(i/1000)%10;
    e=(i/10000)%10;
    if(a==e&&b==d){
    N++;
    } 
  }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:7: error: 'i' was not declared in this scope
    7 |   for(i=A;i<B+1;i++){
      |       ^
a.cc:10:13: error: 'd' cannot be used as a function
   10 |     d(i/1000)%10;
      |             ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
 int A;
 int B;
 cin >> A;
 cin >> B;
  int count = 0;
  while (A <= B) {
    if(A < 1) {
      break;
    }
    string D = to_string(A);
    string C = reverse(D.begin(), D.end());
      if (C == D) {
        count++;
      }
    
    A++;
  }
  cout << count << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:15:23: error: conversion from 'void' to non-scalar type 'std::string' {aka 'std::__cxx11::basic_string<char>'} requested
   15 |     string C = reverse(D.begin(), D.end());
      |                ~~~~~~~^~~~~~~~~~~~~~~~~~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
 int A;
 int B;
 cin >> A;
 cin >> B;
  int count = 0;
  while (A <= B) {
	// 回文数の判定
    string D = to_string(A);
    string C = reverse(D.begin(), D.end());
      if (C == D) {
        count++;
      }
    
    A++;
  }
  cout << count << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:13:23: error: conversion from 'void' to non-scalar type 'std::string' {aka 'std::__cxx11::basic_string<char>'} requested
   13 |     string C = reverse(D.begin(), D.end());
      |                ~~~~~~~^~~~~~~~~~~~~~~~~~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
 int A;
 int B;
 cin >> A;
 cin >> B;
  int count = 0;
  while (A <= B) {
	// 回文数の判定
    string D = to_string(A)
    string C = reverse(D.begin(), D.end());
      if (C == D) {
        count++;
      }
    
    A++;
  }
  cout << count << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:13:5: error: expected ',' or ';' before 'string'
   13 |     string C = reverse(D.begin(), D.end());
      |     ^~~~~~
a.cc:14:11: error: 'C' was not declared in this scope
   14 |       if (C == D) {
      |           ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
 int A;
 int B;
 cin >> A;
 cin >> B;
  int count = 0;
  while (A <= B) {
	// 回文数の判定
    string C = reverse(A.begin(), A.end());
    string D = to_string(A)
      if (C == D) {
        count++;
      }
    
    A++;
  }
  cout << count << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:12:26: error: request for member 'begin' in 'A', which is of non-class type 'int'
   12 |     string C = reverse(A.begin(), A.end());
      |                          ^~~~~
a.cc:12:37: error: request for member 'end' in 'A', which is of non-class type 'int'
   12 |     string C = reverse(A.begin(), A.end());
      |                                     ^~~
a.cc:14:7: error: expected ',' or ';' before 'if'
   14 |       if (C == D) {
      |       ^~
Language: C++

#include <bits/stdc++.h>
using namespace std;

int main(){

int a,b;
  cin >> a >> b;
  int count=0;
  for(int i=a;i<=b;i++){
  string t=i;
    string s=i;
  reverse(t.begin(),t.end());
    if(s==t)count++;
  }
  cout << count << endl;

    
  
  
  


}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:12: error: conversion from 'int' to non-scalar type 'std::string' {aka 'std::__cxx11::basic_string<char>'} requested
   10 |   string t=i;
      |            ^
a.cc:11:14: error: conversion from 'int' to non-scalar type 'std::string' {aka 'std::__cxx11::basic_string<char>'} requested
   11 |     string s=i;
      |              ^
Language: C++

#difine NumberOfDigits 5
#include <iostream>
#include <string>

int main()
{ 	
  	int inputMinValue = 0;
  	int inputMaxValue = 0;
  
	cin >> inputMinValue;
  	cin >> inputMaxValue;
  
  	int NumberOfTimes = inputMinValue - inputMaxValue;
  	char* inputValueAtString = inputValue.c_str();
	
	int NumberForlookingOneOfThem = NumberOfDigits/2
      
    for(int i = 0; i < NumberOfTimes; ++i)
    {
      	for(int j = 0; i < NumberForlookingOneOfThem; ++i)
        {
          NumberForlookingOneOfThem[]
        }
    }
}

Compiler output:
a.cc:1:2: error: invalid preprocessing directive #difine; did you mean #define?
    1 | #difine NumberOfDigits 5
      |  ^~~~~~
      |  define
a.cc: In function 'int main()':
a.cc:10:9: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
   10 |         cin >> inputMinValue;
      |         ^~~
      |         std::cin
In file included from a.cc:2:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:14:36: error: 'inputValue' was not declared in this scope; did you mean 'inputMaxValue'?
   14 |         char* inputValueAtString = inputValue.c_str();
      |                                    ^~~~~~~~~~
      |                                    inputMaxValue
a.cc:16:41: error: 'NumberOfDigits' was not declared in this scope; did you mean 'NumberOfTimes'?
   16 |         int NumberForlookingOneOfThem = NumberOfDigits/2
      |                                         ^~~~~~~~~~~~~~
      |                                         NumberOfTimes
a.cc:18:20: error: 'i' was not declared in this scope
   18 |     for(int i = 0; i < NumberOfTimes; ++i)
      |                    ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(){
  int A, B;
  cin >> A >> B;
  int sum;
  sum = 0;
  for(A <= B; A++){
    int a, b, d, e;
    a = A / 10000, e = A % 10;
    b = (A - a * 10000) / 1000, d = (A - a * 1000 - b * 100) / 10;
    if (a == e && b == d) sum += 1;
  
  }
  cout << sum << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:18: error: expected ';' before ')' token
    8 |   for(A <= B; A++){
      |                  ^
      |                  ;
Language: C++

#include <bits/stdc++.h>
using namespace std;

int main() {
  int A, B;
  cin >> A >> B;
  
  int k=0 ;
  
  for (i=A ; i<=B; i++){
    if (int i%10 == i/10000 && (i/1000)%10 == (i%100)/10 )
      k += 1;
  }    
  cout << k << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:8: error: 'i' was not declared in this scope
   10 |   for (i=A ; i<=B; i++){
      |        ^
a.cc:11:14: error: expected initializer before '%' token
   11 |     if (int i%10 == i/10000 && (i/1000)%10 == (i%100)/10 )
      |              ^
a.cc:11:14: error: expected ')' before '%' token
   11 |     if (int i%10 == i/10000 && (i/1000)%10 == (i%100)/10 )
      |        ~     ^
      |              )
Language: C++

#include <bits/stdc++.h>
using namespace std;

int main() {
  int A, B;
  cin >> A >> B;
  
  int k=0 ;
  
  for (i=A ; i<=B; i++){
    if ( i%10 == i/10000 && (i/1000)%10 == (i%100)/10 )
      k += 1;
  }    
  cout << k << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:8: error: 'i' was not declared in this scope
   10 |   for (i=A ; i<=B; i++){
      |        ^
Language: C++

#include <bits/stdc++.h>
using namespace std;

int main() {
  int A, B;
  cin >> A >> B;
  
  int k=0. i=A;
  
  for ( ; i<=B; i++){
    if ( i%10 == i/10000 && (i%1000)/10 == (i%100)/10 )
      k += 1
  }    
  cout << k << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:12: error: expected ',' or ';' before 'i'
    8 |   int k=0. i=A;
      |            ^
a.cc:10:11: error: 'i' was not declared in this scope
   10 |   for ( ; i<=B; i++){
      |           ^
a.cc:12:13: error: expected ';' before '}' token
   12 |       k += 1
      |             ^
      |             ;
   13 |   }
      |   ~
Language: C++

#include <bits/stdc++.h>
using namespace std;

int main() {
  int A ,B, ana, count;
  cin >> A >> B;
  ana = B - A + 1;
  count=0;
  for(int i = 0; i < ana; i++) {
    int one, ten, sen, man, number;
    number = A + i;
    one = number - number / 10 * 10;
    ten = number - number /100 * 100 - one;
    man = number / 10000;
    sen = number / 1000 - 10 * man;
    if(one = man && ten = sen){
      count++;
    }
  }
    
}

Compiler output:
a.cc: In function 'int main()':
a.cc:16:18: error: lvalue required as left operand of assignment
   16 |     if(one = man && ten = sen){
      |              ~~~~^~~~~~
Language: C

#include<bits/stdc++.h>
using namespace std;
#define ll long long
int main()
{
    ll a,b;
    cin>>a>>b;
    ll cnt=0;
    for(ll i=a;i<=b;i++)
    {
        ll aa=i/10000;
        ll bb=(i/1000)%10;
        //ll cc=(i/100)%10;
        ll cc=(i/10)%10;
        ll dd=i%10;
        if(aa==dd && bb==cc)
        {
            cnt++;
        }
    }
    cout<<cnt<<endl;



}


Compiler output:
main.c:1:9: fatal error: bits/stdc++.h: No such file or directory
    1 | #include<bits/stdc++.h>
      |         ^~~~~~~~~~~~~~~
compilation terminated.
Language: C++

#include <bits/stdc++.h>
using namespace std;

int main()
{
　int A,B;
  cin >> A >> B;
  
  int count = 0;
  for(int i = A; i <= B; i++){
    int tmp1 = i % 10000;
    int tmp2 = i % 1000 % 10;
    int tmp3 = i % 10 %10;
    int tmp4 = i % 10;
    
    if( (tmp1 == tmp5) && (tmp2 == tmp3) ){
      count++;
    }
  }
   cout << count << endl;
}

Compiler output:
a.cc:6:1: error: extended character 　 is not valid in an identifier
    6 | 　int A,B;
      | ^
a.cc: In function 'int main()':
a.cc:6:1: error: '\U00003000int' was not declared in this scope
    6 | 　int A,B;
      | ^~~~~
a.cc:7:10: error: 'A' was not declared in this scope
    7 |   cin >> A >> B;
      |          ^
a.cc:7:15: error: 'B' was not declared in this scope
    7 |   cin >> A >> B;
      |               ^
a.cc:16:18: error: 'tmp5' was not declared in this scope; did you mean 'tmp4'?
   16 |     if( (tmp1 == tmp5) && (tmp2 == tmp3) ){
      |                  ^~~~
      |                  tmp4
Language: C++

#include <bits/stdc++.h>
using namespace std;

int main() {
  int A, B;
  cin >> A >> B;
  
  int a_01 = A / 10000;
  int a_02 = A / 1000 - a_01 * 10;
  int a_03 = A / 100 - a_01 * 100 - a_02 * 10;
  
  int b_01 = B / 10000;
  int b_02 = B / 1000 - b_01 * 10;
  int b_03 = B / 100 - b_01 * 100 - b_02 * 10;
  
  int head = 0, tail = 0;
  
  if (A <= (a_01 * 10000 + a_02 * 1000 + a_03 * 100
            + a_02 * 10 + a_01){
    head = 1;
  }
  
  if (B >= (b_01 * 10000 + b_02 * 1000 + b_03 * 100
            + b_02 * 10 + b_01){
    tail = 1;
  }
      
  int sum = (b_01 - a_01) * 100
      + ((9 - a_02) + b_02) * 10
      + ((9 - a_03) + b_03)
      + head + tail;
      
  cout << sum << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:19:32: error: expected ')' before '{' token
   19 |             + a_02 * 10 + a_01){
      |                                ^
      |                                )
a.cc:18:6: note: to match this '('
   18 |   if (A <= (a_01 * 10000 + a_02 * 1000 + a_03 * 100
      |      ^
a.cc:33:11: error: 'sum' was not declared in this scope
   33 |   cout << sum << endl;
      |           ^~~
Language: C++

#include<bits/stdc++.h>
#define rep(i,n) for(i=0;i<(n);i++)
using namespace std;
using ll=long long;
using P=pair<int,int>;
int unko(int n){
int ans=0;
  while(n!=0){
    ans+=n%10;
    n=n/10;
  }
  return ans;
}
int main(){
  int n,a,b;
  cin >> n >> a >> b;
  for(i=1;i<=n;i++){
    if(unko(i)>=a && unko(i)<=b){
      ans+=i;
    }
  }
  cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:17:7: error: 'i' was not declared in this scope
   17 |   for(i=1;i<=n;i++){
      |       ^
a.cc:19:7: error: 'ans' was not declared in this scope; did you mean 'abs'?
   19 |       ans+=i;
      |       ^~~
      |       abs
a.cc:22:11: error: 'ans' was not declared in this scope; did you mean 'abs'?
   22 |   cout << ans << endl;
      |           ^~~
      |           abs
Language: C++

#include<bits/stdc++.h>
#define rep(i,n) for(i=0;i<(n);i++)
using namespace std;
using ll=long long;
using P=pair<int,int>;
int unko(int n){
int ans=0;
  while(n!=0){
    ans+=n%10;
    n=n/10;
  }
  return ans;
}
int main(){
  int n,a,b;
  cin >> n >> a >> b;
  for(i=1;i<=n;i++){
    if(unko(i)>=a && digit(i)<=){
      ans++;
    }
  }
  cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:17:7: error: 'i' was not declared in this scope
   17 |   for(i=1;i<=n;i++){
      |       ^
a.cc:18:22: error: 'digit' was not declared in this scope
   18 |     if(unko(i)>=a && digit(i)<=){
      |                      ^~~~~
a.cc:18:32: error: expected primary-expression before ')' token
   18 |     if(unko(i)>=a && digit(i)<=){
      |                                ^
a.cc:19:7: error: 'ans' was not declared in this scope; did you mean 'abs'?
   19 |       ans++;
      |       ^~~
      |       abs
a.cc:22:11: error: 'ans' was not declared in this scope; did you mean 'abs'?
   22 |   cout << ans << endl;
      |           ^~~
      |           abs
Language: C++

#include <bits/stdc++.h>
using namespace std;

int main(){
  int A, B, y = 0;
  string x;
  cin >> A >> B;
  while(A =< B){
    x = to_string(A);
    if(x[0] == x[4] && x[1] == x[3]){
      y++;
    }
    A++;
  }
  cout << y << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:12: error: expected primary-expression before '<' token
    8 |   while(A =< B){
      |            ^
Language: C++

int main() {
    unsigned int firstNumber;
    unsigned int lastNumber;
    std::cin >> firstNumber >> lastNumber;
    
    unsigned int numOfPalindrome = 0U;
    for(unsigned int i = firstNumber; i <= lastNumber; ++i) {
        std::string forwardNumber = std::to_string(i);
        std::string reverseNumber = forwardNumber;
        std::reverse(reverseNumber.begin(), reverseNumber.end());
        
        if(forwardNumber == reverseNumber) {
            ++numOfPalindrome;
        }
    }
    std::cout << numOfPalindrome << std::endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:4:10: error: 'cin' is not a member of 'std'
    4 |     std::cin >> firstNumber >> lastNumber;
      |          ^~~
a.cc:1:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
  +++ |+#include <iostream>
    1 | int main() {
a.cc:8:14: error: 'string' is not a member of 'std'
    8 |         std::string forwardNumber = std::to_string(i);
      |              ^~~~~~
a.cc:1:1: note: 'std::string' is defined in header '<string>'; this is probably fixable by adding '#include <string>'
  +++ |+#include <string>
    1 | int main() {
a.cc:9:14: error: 'string' is not a member of 'std'
    9 |         std::string reverseNumber = forwardNumber;
      |              ^~~~~~
a.cc:9:14: note: 'std::string' is defined in header '<string>'; this is probably fixable by adding '#include <string>'
a.cc:10:14: error: 'reverse' is not a member of 'std'
   10 |         std::reverse(reverseNumber.begin(), reverseNumber.end());
      |              ^~~~~~~
a.cc:10:22: error: 'reverseNumber' was not declared in this scope; did you mean 'firstNumber'?
   10 |         std::reverse(reverseNumber.begin(), reverseNumber.end());
      |                      ^~~~~~~~~~~~~
      |                      firstNumber
a.cc:12:12: error: 'forwardNumber' was not declared in this scope; did you mean 'firstNumber'?
   12 |         if(forwardNumber == reverseNumber) {
      |            ^~~~~~~~~~~~~
      |            firstNumber
a.cc:16:10: error: 'cout' is not a member of 'std'
   16 |     std::cout << numOfPalindrome << std::endl;
      |          ^~~~
a.cc:16:10: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:16:42: error: 'endl' is not a member of 'std'
   16 |     std::cout << numOfPalindrome << std::endl;
      |                                          ^~~~
a.cc:1:1: note: 'std::endl' is defined in header '<ostream>'; this is probably fixable by adding '#include <ostream>'
  +++ |+#include <ostream>
    1 | int main() {
Language: C

#include<bits/stdc++.h>
using namespace std;

int main(){
  int A,B;
  cin >> A >> B;
  int ans = 0;
  int A5,A4,A2,A1;
  for(int i=A; i<B+1;i++){
    A5 = i/10000;
    A4 = (i/1000)%10;
    A1 = i%10;
    A2 = (i/10)%10;
    if(A5==A1 && A4==A2)ans++;
  }
  
  cout << ans << endl;
}

Compiler output:
main.c:1:9: fatal error: bits/stdc++.h: No such file or directory
    1 | #include<bits/stdc++.h>
      |         ^~~~~~~~~~~~~~~
compilation terminated.
Language: C++

#include <bits/stdc++.h>
using namespace std;

int main() {
  int a, b, c, v, w, x, y, z;
  cin >> a >> b;
  c = 0;
  for (int i = a; i < b + 1; i++) {
    v = i % 10, i /= 10;
    w = i % 10, i /= 10;
    x = i % 10, i /= 10;
    y = i % 10, i /= 10;
    z = i % 10, i /= 10;
    
    if (v == Z && w == y) {
      c += 1;
    }
  }
  cout << c << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:14: error: 'Z' was not declared in this scope
   15 |     if (v == Z && w == y) {
      |              ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int A, B;
  cin >> A >> B;
  int count = 0;
  
 
    int oneNum = 0;
    int tenNum = 0;
    int hundredNum = 0;
    int thousandNum = 0;
    int tThousandNum = 0;
   
  for (int i = 0; i < 10; i++) {
    tThousandNum = i * 10000;
    oneNum = i;
    for (int j = 0; j < 10; j++) {
      hundredNum = j * 100;
      for (int k = 0; k < 10; k++) {
        thousandNum = k * 1000;
        tenNum = k * 10;
        
        int num = tThousandNum + thousandNum + hundredNum + tenNum + oneNum;
        if (A =< num && num =< B) {
          count++;
        }
      }
    }
  }
  cout << count << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:26:16: error: expected primary-expression before '<' token
   26 |         if (A =< num && num =< B) {
      |                ^
a.cc:26:30: error: expected primary-expression before '<' token
   26 |         if (A =< num && num =< B) {
      |                              ^