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

#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <tuple>
#include <map>
#include <queue>
#include <set>
typedef long long ll;
using namespace std;
#define rep(i, n) for (int i = 0; i < int(n); i++)
#define mod 1000000007
#define fst first
#define pb push_back

int main()
{
 int L,R;
 cin >> L >> R;
 int ans = 0;
 for(int a = 1; a <= 9; i++){
     for(int b = 0; b <= 9; i++){
         for(int c = 1; c <= 9; i++){
             int x = 10001* a + 1010 * b + 100 * c;
             if(x >= L>> && x <= R){
                 ans++;
             }
         }
     }
 }
 cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:21:25: error: 'i' was not declared in this scope
   21 |  for(int a = 1; a <= 9; i++){
      |                         ^
a.cc:25:23: error: invalid operands of types 'int' and 'void*' to binary 'operator>>'
   25 |              if(x >= L>> && x <= R){
      |                      ~^~ ~~~~
      |                      |   |
      |                      int void*
a.cc:25:29: error: label 'x' used but not defined
   25 |              if(x >= L>> && x <= R){
      |                             ^
Language: C++

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

int main() {
  int A, B;
  cin >> A >> B;
  
  int num = 0;
  for (int i = A; i <= B; i++){
    int s, t, u, v;
    s = i % 10;
    t = i/10000 % 10;
    u = i/10 % 10;
    v = i/1000 % 10
    if (s == t && u == v){
      num++;
    }
  }
  cout << num << endl;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:14:20: error: expected ';' before 'if'
   14 |     v = i/1000 % 10
      |                    ^
      |                    ;
   15 |     if (s == t && u == v){
      |     ~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
/*
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define rrep(i, n) for (int i = (int)(n); i >= 0; i--)
#define FOR(i, m, n) for(int i = m; i < n; i++)	
#define SORT(c) sort((c).begin(),(c).end())
#define REVERSE(c) reverse((c).begin(),(c).end())
#define REVSORT(c) SORT(c);REVERSE(c)
#define ALL(x) (x).begin(),(x).end()
#define LOOP while(true)
#define INF 1e9
const long long MOD = 1000000007;
typedef long long ll;
*/

int main(void){
	int A, B;
	cin >> A >> B;
	int cnt = 0;
	for(int i = A; i <= B; i++){
		string S = to_string(i);
		string T = reverse(S.begin(), S.end());
		if(S == T)cnt++;
	}
	cout << cnt << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:23:35: error: conversion from 'void' to non-scalar type 'std::string' {aka 'std::__cxx11::basic_string<char>'} requested
   23 |                 string T = reverse(S.begin(), S.end());
      |                            ~~~~~~~^~~~~~~~~~~~~~~~~~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
/*
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define rrep(i, n) for (int i = (int)(n); i >= 0; i--)
#define FOR(i, m, n) for(int i = m; i < n; i++)	
#define SORT(c) sort((c).begin(),(c).end())
#define REVERSE(c) reverse((c).begin(),(c).end())
#define REVSORT(c) SORT(c);REVERSE(c)
#define ALL(x) (x).begin(),(x).end()
#define LOOP while(true)
#define INF 1e9
const long long MOD = 1000000007;
typedef long long ll;
*/

int main(){
	int A, B;
	cin >> A >> B;
	int cnt = 0;
	for(int i = A; i <= B; i++){
		string S = to_string(i);
		string T = reverse(S.begin(), S.end());
		if(S == T)cnt++;
	}
	cout << cnt << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:23:35: error: conversion from 'void' to non-scalar type 'std::string' {aka 'std::__cxx11::basic_string<char>'} requested
   23 |                 string T = reverse(S.begin(), S.end());
      |                            ~~~~~~~^~~~~~~~~~~~~~~~~~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define rrep(i, n) for (int i = (int)(n); i >= 0; i--)
#define FOR(i, m, n) for(int i = m; i < n; i++)	
#define SORT(c) sort((c).begin(),(c).end())
#define REVERSE(c) reverse((c).begin(),(c).end())
#define REVSORT(c) SORT(c);REVERSE(c)
#define ALL(x) (x).begin(),(x).end()
#define LOOP while(true)
#define INF 1e9
const long long MOD = 1000000007;
typedef long long ll;

int main(){
	int A, B;
	cin >> A >> B;
	int cnt = 0;
	for(int i = A; i <= B; i++){
		string S = to_string(i);
		string T = REVERSE(S);
		if(S == T)cnt++;
	}
	cout << cnt << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:27: error: conversion from 'void' to non-scalar type 'std::string' {aka 'std::__cxx11::basic_string<char>'} requested
    7 | #define REVERSE(c) reverse((c).begin(),(c).end())
      |                    ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
a.cc:21:28: note: in expansion of macro 'REVERSE'
   21 |                 string T = REVERSE(S);
      |                            ^~~~~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define rrep(i, n) for (int i = (int)(n); i >= 0; i--)
#define FOR(i, m, n) for(int i = m; i < n; i++)	
#define SORT(c) sort((c).begin(),(c).end())
#define REVERSE(c) reverse((c).begin(),(c).end())
#define REVSORT(c) SORT(c);REVERSE(c)
#define ALL(x) (x).begin(),(x).end()
#define LOOP while(true)
#define INF 1e9
const long long MOD = 1000000007;
typedef long long ll;

int main(){
	int A, B;
	int cnt = 0;
	for(int i = A, i <= B; i++){
		string S = to_string(i);
		string T = reverse(S.begin(), S.end());
		if(S == T)cnt++;
	}
	cout << cnt << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:18:25: error: expected ';' before '<=' token
   18 |         for(int i = A, i <= B; i++){
      |                         ^~~
      |                         ;
a.cc:18:26: error: expected primary-expression before '<=' token
   18 |         for(int i = A, i <= B; i++){
      |                          ^~
a.cc:20:35: error: conversion from 'void' to non-scalar type 'std::string' {aka 'std::__cxx11::basic_string<char>'} requested
   20 |                 string T = reverse(S.begin(), S.end());
      |                            ~~~~~~~^~~~~~~~~~~~~~~~~~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define rrep(i, n) for (int i = (int)(n); i >= 0; i--)
#define FOR(i, m, n) for(int i = m; i < n; i++)	
#define SORT(c) sort((c).begin(),(c).end())
#define REVERSE(c) reverse((c).begin(),(c).end())
#define REVSORT(c) SORT(c);REVERSE(c)
#define ALL(x) (x).begin(),(x).end()
#define LOOP while(true)
#define INF 1e9
const long long MOD = 1000000007;
typedef long long ll;

int main(){
	int A, B;
	int cnt = 0;
	for(int i = A; i <= B; i++){
		string S = to_string(i);
		string T = REVERSE(S);
		if(S == T)cnt++;
	}
	cout << cnt << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:27: error: conversion from 'void' to non-scalar type 'std::string' {aka 'std::__cxx11::basic_string<char>'} requested
    7 | #define REVERSE(c) reverse((c).begin(),(c).end())
      |                    ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
a.cc:20:28: note: in expansion of macro 'REVERSE'
   20 |                 string T = REVERSE(S);
      |                            ^~~~~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define rrep(i, n) for (int i = (int)(n); i >= 0; i--)
#define FOR(i, m, n) for(int i = m; i < n; i++)	
#define SORT(c) sort((c).begin(),(c).end())
#define REVERSE(c) reverse((c).begin(),(c).end())
#define REVSORT(c) SORT(c);REVERSE(c)
#define ALL(x) (x).begin(),(x).end()
#define LOOP while(true)
#define INF 1e9
const long long MOD = 1000000007;
typedef long long ll;

int main(){
	int A, B;
	int cnt = 0;
	for(int i = A, i <= B; i++){
		string S = to_string(i);
		string T = REVERSE(S);
		if(S == T)cnt++;
	}
	cout << cnt << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:18:25: error: expected ';' before '<=' token
   18 |         for(int i = A, i <= B; i++){
      |                         ^~~
      |                         ;
a.cc:18:26: error: expected primary-expression before '<=' token
   18 |         for(int i = A, i <= B; i++){
      |                          ^~
a.cc:7:27: error: conversion from 'void' to non-scalar type 'std::string' {aka 'std::__cxx11::basic_string<char>'} requested
    7 | #define REVERSE(c) reverse((c).begin(),(c).end())
      |                    ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
a.cc:20:28: note: in expansion of macro 'REVERSE'
   20 |                 string T = REVERSE(S);
      |                            ^~~~~~~
Language: C++

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

int main() {
  int A, B, C;
  cin >> A >> B;
  C = 0;
  for (int i = A; i < B -A +1; i++){
    int D, E, F, G;
    D = i%10;
    E = i/10%10
    F = i/1000%10;
    G = i/10000%10;
    if ((D == G)&&(E == F)) {
      C++;
    }
  }
  cout << C << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:11:16: error: expected ';' before 'F'
   11 |     E = i/10%10
      |                ^
      |                ;
   12 |     F = i/1000%10;
      |     ~
Language: Java

import java.util.*;
public class Main{
	public static void main(String[] args){
    	Scanner sc = new Scanner(System.in);
      int a = sc.nextInt();
      int b = sc.nextInt();
      int x1 = 0;
      int x2 = 0;
      int x3 = 0;
      int x4 = 0;
      int x5 = 0;
      int count++;
      for(int i = a;i <= b;i++){
      	x5 = i%10;
        x1 = i/10000;
        x2 = (i-x1)/1000;
        x3 = (i-x1-x2)/100;
        x4 = (i-x1-x2-x3)/10;
        if(x1==x5&&x2==x4)count++;
      }
      System.out.println(count);
    }
}


Compiler output:
Main.java:12: error: ';' expected
      int count++;
               ^
1 error
Language: Java

import java.util.*;
public class Main{
	public static void main(String[] args){
    	Scanner sc = new Scanner(System.in);
      int a = sc.nextInt();
      int b = sc.nextInt();
      int x1 = 0;
      int x2 = 0;
      int x3 = 0;
      int x4 = 0;
      int x5 = 0;
      int count = 0;
      for(int i = a;i <= b;i++){
      	x5 = i%10;
        x1 = x/10000;
        x2 = (x-x1)/1000;
        x3 = (x-x1-x2)/100;
        x4 = (x-x1-x2-x3)/10;
        if(x1==x5&&x2==x4)count++;
      }
      System.out.println(count);
    }
}


Compiler output:
Main.java:15: error: cannot find symbol
        x1 = x/10000;
             ^
  symbol:   variable x
  location: class Main
Main.java:16: error: cannot find symbol
        x2 = (x-x1)/1000;
              ^
  symbol:   variable x
  location: class Main
Main.java:17: error: cannot find symbol
        x3 = (x-x1-x2)/100;
              ^
  symbol:   variable x
  location: class Main
Main.java:18: error: cannot find symbol
        x4 = (x-x1-x2-x3)/10;
              ^
  symbol:   variable x
  location: class Main
4 errors
Language: Java

import java.util.*;
public class Main{
	public static void main(String[] args){
    	Scanner sc = new Scanner(System.in);
      int a = sc.nextInt();
      int b = sc.nextInt();
      int x1 = 0;
      int x2 = 0;
      int x3 = 0;
      int x4 = 0;
      int x5 = 0;
      int count++;
      for(int i = a;i <= b;i++){
      	x5 = i%10;
        x1 = x/10000;
        x2 = (x-x1)/1000;
        x3 = (x-x1-x2)/100;
        x4 = (x-x1-x2-x3)/10;
        if(x1==x5&&x2==x4)count++;
      }
      System.out.println(count);
    }
}

Compiler output:
Main.java:12: error: ';' expected
      int count++;
               ^
1 error
Language: C++

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

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

Compiler output:
a.cc: In function 'int main()':
a.cc:8:11: error: expected unqualified-id before '=' token
    8 |   for(int = A; i <= B; i++){
      |           ^
a.cc:8:10: error: expected ';' before '=' token
    8 |   for(int = A; i <= B; i++){
      |          ^~
      |          ;
a.cc:8:11: error: expected primary-expression before '=' token
    8 |   for(int = A; i <= B; i++){
      |           ^
a.cc:8:16: error: 'i' was not declared in this scope
    8 |   for(int = A; i <= B; i++){
      |                ^
a.cc:8:22: error: expected ')' before ';' token
    8 |   for(int = A; i <= B; i++){
      |      ~               ^
      |                      )
a.cc:8:24: error: 'i' was not declared in this scope
    8 |   for(int = A; i <= B; i++){
      |                        ^
Language: C++

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

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


Compiler output:
a.cc: In function 'int main()':
a.cc:10:20: error: 'x' was not declared in this scope
   10 |     if (i/10000 == x%10 && (i-i/10000*10000)/1000 == (x%100-x%10)/10)
      |                    ^
Language: C++

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

int main() {
  int A,B,C,D,X,Y;
  cin >> A>> B;
  {int S=0;
    for(int i = A;i<B+1;i++){
C=i/10000;
D=(i-C*10000)/1000;
  X=i-C-D*10;
  Y=X%100;
  if(Y=0){
    S++;
  }
    } 
}
cout<<S<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:18:7: error: 'S' was not declared in this scope
   18 | cout<<S<<endl;
      |       ^
Language: C++

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

int main() {
  int A,B,C,D,X,Y,S=0;
  cin >> A>> B;
for(int i = A;i<B+1;i++){
C=A%10000;
D=(i-C*10000)%1000;
  X=i-C-D*10;
  Y=X%100
  if(Y=0){
    S++;
  }
  
}
cout<<S<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:11:10: error: expected ';' before 'if'
   11 |   Y=X%100
      |          ^
      |          ;
   12 |   if(Y=0){
      |   ~~
Language: C++

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

int main() {
  int A,B,C,D,X,S=0;
  cin >> A>> B;
for(int i = A;i<B+1;i++){
C=A%10000;
D=(i-C*10000)%1000;
  X=i-C-D*10;
  if(0=X%100){
    S++;
  }
  
}
cout<<S<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:11:6: error: lvalue required as left operand of assignment
   11 |   if(0=X%100){
      |      ^
Language: C++

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

int main() {
  int A,B,C,D,X,S=0;
  cin >> A>> B;
for(int i = A;i<B+1;i++){
C=A%10000;
D=(i-C*10000)%1000;
  X=i-C-D*10;
  if(X%100=0){
    S++;
  }
  
}
cout<<S<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:11:7: error: lvalue required as left operand of assignment
   11 |   if(X%100=0){
      |      ~^~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main() {
  int A,B;
  cin>>A>>B;
  int count=0;
  for(int t=A;t<=B;t++){
    string i=to_string(t);
    if(i.at(0)==i.at(4)&&i.at(1)==i.at(3)){
      count++;
      int t=stoi(i)
    }
  }
  cout<<count;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:12:5: error: expected ',' or ';' before '}' token
   12 |     }
      |     ^
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++){
    if(i.at(0)==i.at(4)&&i.at(1)==i.at(3)){
      count++;
    }
  }
  cout<<count;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:10: error: request for member 'at' in 'i', which is of non-class type 'int'
    8 |     if(i.at(0)==i.at(4)&&i.at(1)==i.at(3)){
      |          ^~
a.cc:8:19: error: request for member 'at' in 'i', which is of non-class type 'int'
    8 |     if(i.at(0)==i.at(4)&&i.at(1)==i.at(3)){
      |                   ^~
a.cc:8:28: error: request for member 'at' in 'i', which is of non-class type 'int'
    8 |     if(i.at(0)==i.at(4)&&i.at(1)==i.at(3)){
      |                            ^~
a.cc:8:37: error: request for member 'at' in 'i', which is of non-class type 'int'
    8 |     if(i.at(0)==i.at(4)&&i.at(1)==i.at(3)){
      |                                     ^~
Language: C++

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

int main(){
  int A, B, t[x], s[x];
  int counter = 0;
  cin >> A >> B;
  for(int i = A;i < B + 1;i++){
    s[0] = i;
    for(int x = 0;x < 5;x++){
      t[x] = s[x] % 10;
      s[x] = i / 10;
    }
    if(t[0] == t[4] && t[1] == t[3]){
      counter += 1;
    }
  }
  cout << counter << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:15: error: 'x' was not declared in this scope
    5 |   int A, B, t[x], s[x];
      |               ^
a.cc:9:5: error: 's' was not declared in this scope
    9 |     s[0] = i;
      |     ^
a.cc:11:7: error: 't' was not declared in this scope
   11 |       t[x] = s[x] % 10;
      |       ^
a.cc:14:8: error: 't' was not declared in this scope
   14 |     if(t[0] == t[4] && t[1] == t[3]){
      |        ^
Language: C++

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

int main() {

  int A, B, first, latter, sum;
  cin >> A >> B;
  sum = 1;
  for (int i = A; i <= B; i++) {
    first = i / 1000;
    latter = i % 10 * 10 + i / 10 % 10
    if (first == latter)
      sum += 1;#include <bits/stdc++.h>
using namespace std;

int main() {

  int A, B, first, latter, sum;
  cin >> A >> B;
  sum = 0;
  for (int i = A; i <= B; i++) {
    first = i / 1000;
    latter = i % 10 * 10 + i / 10 % 10;
    if (first == latter)
      sum += 1;
    else
      continue;
  }
  cout << sum << endl;
}

    else
      continue;
  }
  cout << sum << endl;
}


Compiler output:
a.cc:13:16: error: stray '#' in program
   13 |       sum += 1;#include <bits/stdc++.h>
      |                ^
a.cc: In function 'int main()':
a.cc:11:39: error: expected ';' before 'if'
   11 |     latter = i % 10 * 10 + i / 10 % 10
      |                                       ^
      |                                       ;
   12 |     if (first == latter)
      |     ~~                                 
a.cc:13:17: error: 'include' was not declared in this scope
   13 |       sum += 1;#include <bits/stdc++.h>
      |                 ^~~~~~~
a.cc:13:26: error: 'bits' was not declared in this scope
   13 |       sum += 1;#include <bits/stdc++.h>
      |                          ^~~~
a.cc:13:31: error: 'stdc' was not declared in this scope; did you mean 'std'?
   13 |       sum += 1;#include <bits/stdc++.h>
      |                               ^~~~
      |                               std
a.cc:14:1: error: expected primary-expression before 'using'
   14 | using namespace std;
      | ^~~~~
a.cc:16:9: warning: empty parentheses were disambiguated as a function declaration [-Wvexing-parse]
   16 | int main() {
      |         ^~
a.cc:16:9: note: remove parentheses to default-initialize a variable
   16 | int main() {
      |         ^~
      |         --
a.cc:16:9: note: or replace parentheses with braces to value-initialize a variable
a.cc:16:12: error: a function-definition is not allowed here before '{' token
   16 | int main() {
      |            ^
a.cc:32:5: error: 'else' without a previous 'if'
   32 |     else
      |     ^~~~
Language: C++

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

int main() {
  
  int pre, last, num = 0;

  cin >> pre >> last;
  
  for (int i = pre; i <= left; i++) {
    string str;
    
    str = i;
    
    if (str[0] == str[4] && str[1] == str[3]) {
      num++;
    }
  }
  
  cout << num << endl;
  

}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:23: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
   10 |   for (int i = pre; i <= left; i++) {
      |                     ~~^~~~~~~
Language: C++

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

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

Compiler output:
a.cc: In function 'int main()':
a.cc:8:12: error: expected ';' before '==' token
    8 |   for(int i==A;i<=B;i++){
      |            ^~
      |            ;
a.cc:8:12: error: expected primary-expression before '==' token
    8 |   for(int i==A;i<=B;i++){
      |            ^~
a.cc:8:20: error: expected ')' before ';' token
    8 |   for(int i==A;i<=B;i++){
      |      ~             ^
      |                    )
a.cc:8:21: error: 'i' was not declared in this scope
    8 |   for(int i==A;i<=B;i++){
      |                     ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int A,B;
  cin>>A>>B;
  int sum=B%100-A%100;
  if(A<=P(A))sum++;
  if(B<P(B))sum--;
  cout<<sum<<endl;
}
int P(int x){
    int a,b,c,px;
    a=x/1000;
    b=a%10;
    a/=10;
    c=a%10;
    px=(x/100)*100+10*b+c
    return px;
  }

Compiler output:
a.cc: In function 'int main()':
a.cc:8:9: error: 'P' was not declared in this scope
    8 |   if(A<=P(A))sum++;
      |         ^
a.cc:9:8: error: 'P' was not declared in this scope
    9 |   if(B<P(B))sum--;
      |        ^
a.cc: In function 'int P(int)':
a.cc:18:26: error: expected ';' before 'return'
   18 |     px=(x/100)*100+10*b+c
      |                          ^
      |                          ;
   19 |     return px;
      |     ~~~~~~                
a.cc:20:3: warning: no return statement in function returning non-void [-Wreturn-type]
   20 |   }
      |   ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int A,B;
  cin>>A>>B;
  int sum=B%100-A%100;
  if(A<=P(A))sum++;
  if(B<P(B))sum--;
  cout<<sum<<endl;
}
int P(x){
    int a,b,c,px;
    a=x/1000;
    b=a%10;
    a/=10;
    c=a%10;
    px=(x/100)*100+10*b+c
    return px;
  }

Compiler output:
a.cc: In function 'int main()':
a.cc:8:9: error: 'P' was not declared in this scope
    8 |   if(A<=P(A))sum++;
      |         ^
a.cc:9:8: error: 'P' was not declared in this scope
    9 |   if(B<P(B))sum--;
      |        ^
a.cc: At global scope:
a.cc:12:7: error: 'x' was not declared in this scope
   12 | int P(x){
      |       ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int A,B;
  cin>>A>>B;
  int sum=B%100-A%100;
  int P(x){
    int a,b,c,px;
    a=x/1000;
    b=a%10;
    a/=10;
    c=a%10;
    px=(x/100)*100+10*b+c
    return px;
  }
  if(A<=P(A))sum++;
  if(B<P(B))sum--;
  cout<<sum<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:9: error: 'x' was not declared in this scope
    8 |   int P(x){
      |         ^
a.cc:17:10: error: 'P' cannot be used as a function
   17 |   if(A<=P(A))sum++;
      |         ~^~~
a.cc:18:9: error: 'P' cannot be used as a function
   18 |   if(B<P(B))sum--;
      |        ~^~~
Language: C++

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

int main() {
  int a, b, count=0;
  cin >> a >> b;

  for (i = a; i <= b; i++) {
    if ((i/10000 == i%10) && ((i/1000)%10 == (i/10)%10)) {
      count++;
    }
  }

  std::cout << count << '\n';
  
  return 0;
}


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

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

int main() {
  int a, b, count=0;
  cin >> a >> b;

  for (i = a; i <= b; i++) {
    if ((i/10000 == i%10) && ((i/1000)%10 == (i/10)%10) {
      count++;
    }
  }

  std::cout << count << '\n';
  
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:8: error: 'i' was not declared in this scope
    8 |   for (i = a; i <= b; i++) {
      |        ^
a.cc:9:56: error: expected ')' before '{' token
    9 |     if ((i/10000 == i%10) && ((i/1000)%10 == (i/10)%10) {
      |        ~                                               ^~
      |                                                        )
a.cc:12:3: error: expected primary-expression before '}' token
   12 |   }
      |   ^
Language: C++

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

int main() {
  int A,B,a,b,c,d,e,x,count;
  
  cin >> A >> B;
  
  while(A<B){
   a = A / 10000;
   b = A % 10000 / 1000;
   c = A % 10000 % 1000 / 100;
   d = A % 10000 % 1000 % 100 / 10;
   e = A % 10000 % 1000 % 100 % 1O;
  
   x = e * 10000 + d * 1000 + c * 100 + b * 10 + a;
  
   if(x == B){
     count++;
   }
   A++;
    
  }
  
   cout << count << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:14:33: error: unable to find numeric literal operator 'operator""O'
   14 |    e = A % 10000 % 1000 % 100 % 1O;
      |                                 ^~
Language: C++

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

int main(){
  int A,B,sum;
  cin >> A >> B;
  while(A<B){
    int a,b,c,d;
    a = A / 10000; //万の位
    b = A % 10;　//1の位
    c = A / 1000 % 10; //千の位
    d = A / 10 % 10; //十の位
    if(a == b && c == d){
       sum+=1;
    }
    A+=1;
  }
  cout << sum << endl;
}
       


Compiler output:
a.cc:10:16: error: extended character 　 is not valid in an identifier
   10 |     b = A % 10;　//1の位
      |                ^
a.cc: In function 'int main()':
a.cc:10:16: error: '\U00003000' was not declared in this scope
   10 |     b = A % 10;　//1の位
      |                ^~
Language: C++

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

int main(){
  int A,B,x,sum;
  cin >> A >> B;
  while(A<B){
    int a,b,c,d;
    a = A / 10000; //万の位
    b = A % 10;　//1の位
    c = A / 1000 % 10; //千の位
    d = A / 10 % 10; //十の位
    if(a == b && c == d){
       sum+=1;
    }
         A+=1;
  }
  cout << sum << endl;
}
       


Compiler output:
a.cc:10:16: error: extended character 　 is not valid in an identifier
   10 |     b = A % 10;　//1の位
      |                ^
a.cc: In function 'int main()':
a.cc:10:16: error: '\U00003000' was not declared in this scope
   10 |     b = A % 10;　//1の位
      |                ^~
Language: C++

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

int main() {
  int A, B;
  cin >> A >> B;
  int N = 0;
  for(int i = A; i <= B; i++) {
    if(i / 10000 == i % 10 && ((i - (i / 10000) * 10000) / 1000 == (i % 100) / 10) {
      N++;
    }
  }
      
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:83: error: expected ')' before '{' token
    9 |     if(i / 10000 == i % 10 && ((i - (i / 10000) * 10000) / 1000 == (i % 100) / 10) {
      |       ~                                                                           ^~
      |                                                                                   )
a.cc:12:3: error: expected primary-expression before '}' token
   12 |   }
      |   ^
Language: C++

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

int main() {
  int A, B;
  cin >> A >> B;
  int N = 0;
  for(int i = A; i <= B; i++) {
    if(i / 10000 == i % 10 && ((i - (i / 10000) * 10000) / 1000 == (i % 100) / 10)
      N++;
  }
      
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:83: error: expected ';' before 'N'
    9 |     if(i / 10000 == i % 10 && ((i - (i / 10000) * 10000) / 1000 == (i % 100) / 10)
      |                                                                                   ^
      |                                                                                   ;
   10 |       N++;
      |       ~                                                                            
a.cc:11:3: error: expected primary-expression before '}' token
   11 |   }
      |   ^
a.cc:10:11: error: expected ')' before '}' token
   10 |       N++;
      |           ^
      |           )
   11 |   }
      |   ~        
a.cc:9:7: note: to match this '('
    9 |     if(i / 10000 == i % 10 && ((i - (i / 10000) * 10000) / 1000 == (i % 100) / 10)
      |       ^
a.cc:11:3: error: expected primary-expression before '}' token
   11 |   }
      |   ^
Language: C++

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

int main() {
  int A, B;
  cin >> A >> B;
  int N = 0;
  for(i = A; i <= B; i++) {
    if(i / 10000 == i % 10 && (i / 1000 + i % 100) % 11 == 0)
      N++;
  }
      
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:7: error: 'i' was not declared in this scope
    8 |   for(i = A; i <= B; i++) {
      |       ^
Language: C++

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

Compiler output:
a.cc: In function 'int main()':
a.cc:8:5: error: 'a' was not declared in this scope
    8 |     a=i%10
      |     ^
a.cc:19:5: error: 'else' without a previous 'if'
   19 |     else
      |     ^~~~
Language: C++

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

Compiler output:
a.cc: In function 'int main()':
a.cc:8:5: error: 'a' was not declared in this scope
    8 |     a=i%10
      |     ^
a.cc:19:5: error: 'else' without a previous 'if'
   19 |     else
      |     ^~~~
a.cc:22:23: error: expected '}' at end of input
   22 |   cout << sum << endl;
      |                       ^
a.cc:4:12: note: to match this '{'
    4 | int main() {
      |            ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(void){
    // Your code here!
    int A, B;
    int Left, Right;
    cin >> A >> B;
    int Agyaku = A / 1000;
    int Agyaku = Agyaku / 10 + (Agyaku - Agyaku / 10 * 10) * 10;
    int Bgyaku = B / 1000;
    int Bgyaku = Bgyaku / 10 + (Bgyaku - Bgyaku / 10 * 10) * 10;
    if (Agyaku >= A - A / 100 * 100){
        Left = A / 100;
    }else {
        Left = A / 100 + 1;
    }
    if (Bgyaku <= B - B / 100 * 100){
        Right = B / 100;
    }else {
        Right = B / 100 - 1;
    }
    cout << Right - Left + 1 << endl;
    
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:9: error: redeclaration of 'int Agyaku'
    9 |     int Agyaku = Agyaku / 10 + (Agyaku - Agyaku / 10 * 10) * 10;
      |         ^~~~~~
a.cc:8:9: note: 'int Agyaku' previously declared here
    8 |     int Agyaku = A / 1000;
      |         ^~~~~~
a.cc:11:9: error: redeclaration of 'int Bgyaku'
   11 |     int Bgyaku = Bgyaku / 10 + (Bgyaku - Bgyaku / 10 * 10) * 10;
      |         ^~~~~~
a.cc:10:9: note: 'int Bgyaku' previously declared here
   10 |     int Bgyaku = B / 1000;
      |         ^~~~~~
Language: C++

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


Compiler output:
a.cc: In function 'int main()':
a.cc:16:5: error: expected ',' or ';' before 'if'
   16 |     if(a == e && b == d){
      |     ^~
a.cc:20:15: error: 'sum' was not declared in this scope
   20 |       cout << sum << endl;
      |               ^~~
Language: C++

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

Compiler output:
a.cc: In function 'int main()':
a.cc:8:7: error: 'i' was not declared in this scope
    8 |   for(i = A ; i <= B ; i++ ){
      |       ^
Language: C++

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

int main(){
  
  int A,B,count = 0;
  cin >> A >> B;
  
  for(A;A < B;A++){
    int s1 = A / 10000;
    int s2 = A / 1000 % 10;
    int s4 = A % 100 / 10;
    int s5 = A % 10;
    
    if(s1 == s5 && s2 == s3){
      count++;
    }
  }
  cout << count << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:26: error: 's3' was not declared in this scope; did you mean 's5'?
   15 |     if(s1 == s5 && s2 == s3){
      |                          ^~
      |                          s5
Language: C++

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

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

Compiler output:
a.cc:4:12: error: expected initializer before 'A'
    4 | int maiint A, B count;
      |            ^
a.cc:5:5: error: 'cin' does not name a type
    5 |     cin >> A >>B;
      |     ^~~
a.cc:6:5: error: 'count' does not name a type
    6 |     count = 0;
      |     ^~~~~
a.cc:8:5: error: expected unqualified-id before 'for'
    8 |     for (int i = A; i < B; i++){
      |     ^~~
a.cc:8:21: error: 'i' does not name a type
    8 |     for (int i = A; i < B; i++){
      |                     ^
a.cc:8:28: error: 'i' does not name a type
    8 |     for (int i = A; i < B; i++){
      |                            ^
a.cc:14:5: error: 'cout' does not name a type
   14 |     cout << count << endl;
      |     ^~~~
a.cc:15:1: error: expected declaration before '}' token
   15 | }
      | ^
Language: C

#include<stdio.h>

int main()
{
  int a,b;
  int w,x,y,z;
  int i,ans=0;
  scanf("%d %d",&a,&b);
  for(i=a;i<=b;i++)
  {
    w=i/10000;
    x=(i/1000)%10;
    y=(i/10)%10;
    z=i%10;
    if(w==z&&x=-y)ans++;
  }
  printf("%d",ans);
}

Compiler output:
main.c: In function 'main':
main.c:15:15: error: lvalue required as left operand of assignment
   15 |     if(w==z&&x=-y)ans++;
      |               ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define rep2(i, s, n) for (int i = (s); i < (int)(n); i++)

int main() {
    int a,b,res=0;cin>>a>>b;
    rep2(i,a,b+1) {
        String s = to_string(i);
        int sl = s.length();
        rep(j,sl/2) {
            if(s[j]==s[sl-j-1]) res++;
        }
    }
    cout<<res<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:9: error: 'String' was not declared in this scope
    9 |         String s = to_string(i);
      |         ^~~~~~
a.cc:10:18: error: 's' was not declared in this scope; did you mean 'sl'?
   10 |         int sl = s.length();
      |                  ^
      |                  sl
Language: C++

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

int main(){
  int A,B;
  int ans=0;
  cin >> A >> B;
  
  for(int i=A;i<B+1;i++){
    int a,b,c,d,e;
    e=temp%10;
    d=(temp/10)%10;
    b=(temp/1000)%10;
    a=(temp/10000)%10;
    if(a==e&&b==d) ans++;
  }
  
  cout << ans <<endl;
}
    

Compiler output:
a.cc: In function 'int main()':
a.cc:11:7: error: 'temp' was not declared in this scope; did you mean 'tm'?
   11 |     e=temp%10;
      |       ^~~~
      |       tm
Language: C++

#include<bits/stdc++.h>
using namespace std;
 
int main(){
  int a, b;
  cin >> a >> b;
  vector<int> x(5);
  int ans = 0;
  for(int i = a; i <=b; i++){
    x[0] = i % 10;
    x[1] = i/10 % 10;
    x[2] = i/100 % 10;
    x[3] = i/1000 % 10;
    x[4] = i/10000 % 10;
    }
    if(x[0] == x[4] && x[1] == x[3]){
      ans++;
    }
  }
  cout << ans << endl;
}

Compiler output:
a.cc:20:3: error: 'cout' does not name a type
   20 |   cout << ans << endl;
      |   ^~~~
a.cc:21:1: error: expected declaration before '}' token
   21 | }
      | ^
Language: C++

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

int main(){
  int a,b;
  cin >> a >> b;
  int s,t,u,v,w;
  for(int i = a; i <= b; i++){
    s = i % 10;
    t = i/10 % 10;
    u = i/100 % 10;
    v = i/1000 % 10;
    w = i/10000 % 10;
    
    if(s == w && t == v){
      ans++;
    }
  }
  cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:16:7: error: 'ans' was not declared in this scope; did you mean 'abs'?
   16 |       ans++;
      |       ^~~
      |       abs
a.cc:19:11: error: 'ans' was not declared in this scope; did you mean 'abs'?
   19 |   cout << ans << endl;
      |           ^~~
      |           abs
Language: C++

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

int main(){
  int a, b;
  cin >> a, b;
  vector<int> x(5);
  int ans = 0;
  for(int i = a; i <=b; i++){
    for(int j = 0; j < 5; j++){
      x(j) = i % 10;
      i /= 10;
    }
    if(x(0) == x(4) && x(1) == x(3)){
      ans++;
    }
  }
  cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:8: error: no match for call to '(std::vector<int>) (int&)'
   11 |       x(j) = i % 10;
      |       ~^~~
a.cc:14:9: error: no match for call to '(std::vector<int>) (int)'
   14 |     if(x(0) == x(4) && x(1) == x(3)){
      |        ~^~~
a.cc:14:17: error: no match for call to '(std::vector<int>) (int)'
   14 |     if(x(0) == x(4) && x(1) == x(3)){
      |                ~^~~
a.cc:14:25: error: no match for call to '(std::vector<int>) (int)'
   14 |     if(x(0) == x(4) && x(1) == x(3)){
      |                        ~^~~
a.cc:14:33: error: no match for call to '(std::vector<int>) (int)'
   14 |     if(x(0) == x(4) && x(1) == x(3)){
      |                                ~^~~
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;i++){
    if((i/10000==i%10)&&((i/1000-(i/10000)*10)==((i%100)-i%10)/10){
      sum++;
    }
       }
       cout<<sum<<endl;
       }

Compiler output:
a.cc: In function 'int main()':
a.cc:8:67: error: expected ')' before '{' token
    8 |     if((i/10000==i%10)&&((i/1000-(i/10000)*10)==((i%100)-i%10)/10){
      |       ~                                                           ^
      |                                                                   )
a.cc:11:8: error: expected primary-expression before '}' token
   11 |        }
      |        ^
Language: C++

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

int main(){
    int a,b,c=0;
    string s;
    cin>>a>>b;
    for(int i=a;i<=b;i++){
        itoa(i,s,10);
        for(int j=0;j<(s.size()+1)/2;j++){
            if(s[j]!=s[s.size()-j-1]) break;
            if(j==(s.size()-1)/2) c++;
        }
    }
    cout<<c<<endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:9: error: 'itoa' was not declared in this scope
    9 |         itoa(i,s,10);
      |         ^~~~
Language: C++

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


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

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

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

#include <bits/stdc++.h>
using namespace std;
int main(){
  int A, B, M, i1,i2,i3,c;
  cin >> A >> B;
  M=A;i1=1;c=0;
  while(A <= M && M <= B){
    M=10001;
    while(i1<10){
      while(i2<10){
        while(i3<10){
          if(A<=M && M<=B){
            c++;
          }
          M+=100
          if(i3+1==10){
            M=i1*10001+i2*1010;
          }
          i3++;
        }
        M+=1010;
        if(i2+1==10){
          M=i1*10001;
        }
        i2++;
      }
      M+=10001;
      i1++;
    }
  }
  cout << c << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:17: error: expected ';' before 'if'
   15 |           M+=100
      |                 ^
      |                 ;
   16 |           if(i3+1==10){
      |           ~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int A,B;
  cin >> A,B;
 int c = 0;
  for(int i = A; i<=B; i++){
    int s = i/10000; //10000の位
    int t = i/1000 % 10;//1000の位
    int u = i%100 /10;//10の位
    int v = i%10;//1の位
    cout << s << t << u << v << endl;
      if( s==v && t==u){
        c++;
      }
  }
    cout << c << endl;

Compiler output:
a.cc: In function 'int main()':
a.cc:18:23: error: expected '}' at end of input
   18 |     cout << c << endl;
      |                       ^
a.cc:4:12: note: to match this '{'
    4 | int main() {
      |            ^
Language: C++

#include <iostream>
#include <vector>
#include <cmath>

using namespace std;

string conv(int a){
  string s;
  for(int i = (int)log10(a); i >= 0; i--){
    s.push_back(a / pow(10,i));
    a -= pow(10,i);
  }
  return s;
}

int main(){
  int A, B;
  cin >> A >> B;
  
  for(int a = A; a <= B; a++){
    string p = conv(a);
    int f = 0;
    for(int i = 0; i < p.size()/2 ; i++){
      if(p[i] != p[p.size() - i - 1]) f = 1;
    }
    if(!f) cnt++;
  }
  cout << cnt;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:26:12: error: 'cnt' was not declared in this scope; did you mean 'int'?
   26 |     if(!f) cnt++;
      |            ^~~
      |            int
a.cc:28:11: error: 'cnt' was not declared in this scope; did you mean 'int'?
   28 |   cout << cnt;
      |           ^~~
      |           int
Language: C++

#include <iostream>
#include <vector>
#include <cmath>

using namespace std;

string conv(int a){
  string s;
  for(int i = (int)log10(a); i >= 0; i--){
    s.push_back(a / pow(10,i));
    a -= pow(10,i);
  }
  return s;
}

int main(){
  int A, B;
  cin >> A >> B;
  
  for(int a = A; a <= B; a++){
    string p = conv(a);
    int f = 0;
    for(int i = 0; i < p.size()/2 ; i++){
      if(p[i] != p[N - i - 1]) f = 1;
    }
    if(!f) cnt++;
  }
  cout << cnt;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:24:20: error: 'N' was not declared in this scope
   24 |       if(p[i] != p[N - i - 1]) f = 1;
      |                    ^
a.cc:26:12: error: 'cnt' was not declared in this scope; did you mean 'int'?
   26 |     if(!f) cnt++;
      |            ^~~
      |            int
a.cc:28:11: error: 'cnt' was not declared in this scope; did you mean 'int'?
   28 |   cout << cnt;
      |           ^~~
      |           int
Language: C++

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

int main(){
  int A, B, x;
  cin >> A >>B;
  for(int i = A;i = <B;i++){
    int a, b, c, d;
    A++;
    a = A / 10000;
    b = A / 1000 % 10;
    c = A / 10 % 10;
    d = A % 10;
    if(a == d && b == c){
      x++;
    }
  }
  cout << x <<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:21: error: expected primary-expression before '<' token
    7 |   for(int i = A;i = <B;i++){
      |                     ^
Language: C++

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

int main(){
  int A, B, x;
  cin >> A >>B;
  for(int i >= A;i <= B;i++){
    int a, b, c, d;
    A++;
    a = A / 10000;
    b = A / 1000 % 10;
    c = A / 10 % 10;
    d = A % 10;
    if(a == d && b == c){
      x++;
    }
  }
  cout << x <<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:12: error: expected ';' before '>=' token
    7 |   for(int i >= A;i <= B;i++){
      |            ^~~
      |            ;
a.cc:7:13: error: expected primary-expression before '>=' token
    7 |   for(int i >= A;i <= B;i++){
      |             ^~
a.cc:7:24: error: expected ')' before ';' token
    7 |   for(int i >= A;i <= B;i++){
      |      ~                 ^
      |                        )
a.cc:7:25: error: 'i' was not declared in this scope
    7 |   for(int i >= A;i <= B;i++){
      |                         ^
Language: C++

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


/*
int main() {
  int a, b;
  cin >> a >> b;
  int cnt = 0;
  for (int i = a; a <= b; i++) {
    int s = i / 1000;
    int t = i % 10;
    int u = (i / 100) % 10;
    int v = (i % 100) / 10;
    if ((s== t) && (u == v)) {
      cnt++;
    }
  }
  cout << cnt << endl;
}
*/

Compiler output:
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/14/../../../x86_64-linux-gnu/Scrt1.o: in function `_start':
(.text+0x17): undefined reference to `main'
collect2: error: ld returned 1 exit status
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++){
    if(10000*(i%10)+1000*((i/10)%10)+100*((i/100)%10)+10*((i/1000)%10)+(i/10000)%10)==i)sum+=1;
  }
  cout << sum;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:85: error: expected primary-expression before '==' token
    9 |     if(10000*(i%10)+1000*((i/10)%10)+100*((i/100)%10)+10*((i/1000)%10)+(i/10000)%10)==i)sum+=1;
      |                                                                                     ^~
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main() {
  int A, B, count = 0;
  cin >> A >> B;
  for(int i = A; i <= B; i++) {
    int tth, tho, ten, one;
    tth = i / 10000;
    tho = i / 1000 % 10;
    ten = i / 10 % 10;
    one = i % 10;
    if(tth == one && tho == ten) {
      count++:
    }
  }
  cout << count << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:14: error: expected ';' before ':' token
   13 |       count++:
      |              ^
      |              ;
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/10)%10) ) res++;
  }
  
  cout << res << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:55: error: expected primary-expression before ')' token
   10 |     if ( (i/10000)==(i%10) && (i/1000)%10==(i/10)%10) ) res++;
      |                                                       ^
Language: C++

#include<iostream>

int flip(int n){
  int ret = 0;
  while(n > 0){
    ret += n % 10;
    n /= 10;
  }
  return n;
}

int main(void){
  int A, B;
  cin >> A >> B;
  int ans = 0;
  for(int n = A; n <= B; n++){
    if(n == flip(n)) ans++;
  }
  cout << ans << endl;
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:14:3: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
   14 |   cin >> A >> B;
      |   ^~~
      |   std::cin
In file included from a.cc:1:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:19:3: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   19 |   cout << ans << endl;
      |   ^~~~
      |   std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:19:18: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   19 |   cout << ans << endl;
      |                  ^~~~
      |                  std::endl
In file included from /usr/include/c++/14/iostream:41:
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
Language: C++

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

int main(){
  int N,M; cin >> N >> M;
  char A[5];
  int ans = 0;
  for(int i=N;i<=M;i++){
    string t = "i";
    A = "t";
    if(A[0] == A[4] && A[1] == A[3]) 
    ans++;
  }
  cout << ans << endl;
}
    

Compiler output:
a.cc: In function 'int main()':
a.cc:10:7: error: incompatible types in assignment of 'const char [2]' to 'char [5]'
   10 |     A = "t";
      |     ~~^~~~~
Language: C++

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

int main(){
  int N,M; cin >> N >> M;
  char A[5];
  int ans = 0;
  for(int i=N;i<=M;i++){
    A = (char)"i";
    if(A[0] == A[4] && A[1] == A[3]) 
    ans++;
  }
  cout << ans << endl;
}
    

Compiler output:
a.cc: In function 'int main()':
a.cc:9:9: error: cast from 'const char*' to 'char' loses precision [-fpermissive]
    9 |     A = (char)"i";
      |         ^~~~~~~~~
a.cc:9:7: error: incompatible types in assignment of 'char' to 'char [5]'
    9 |     A = (char)"i";
      |     ~~^~~~~~~~~~~
Language: C++

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

int main(){
  int N,M; cin >> N >> M;
  char A[5];
  int ans = 0;
  for(int i=N;i<=M;i++){
    A = (string)"i";
    if(A[0] == A[4] && A[1] == A[3]) 
    ans++;
  }
  cout << ans << endl;
}
    

Compiler output:
a.cc: In function 'int main()':
a.cc:9:7: error: incompatible types in assignment of 'std::string' {aka 'std::__cxx11::basic_string<char>'} to 'char [5]'
    9 |     A = (string)"i";
      |     ~~^~~~~~~~~~~~~