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

#include <iostream>
#include <string>
#include <algorithm>
 
using namespace std;
 
int main(){
  int a,b;
  int count=0;
  string s,reverse_s;
  cin>>a;
  cin>>b;
  for(int i=a;i<=b;i++){
    s=to_string(i);
    saved=copy(s);
    if(saved==reverse(s.begin(),s.end())){
      count+=1;
    }
  }
  cout<<count<<endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:5: error: 'saved' was not declared in this scope
   15 |     saved=copy(s);
      |     ^~~~~
a.cc:15:15: error: no matching function for call to 'copy(std::string&)'
   15 |     saved=copy(s);
      |           ~~~~^~~
In file included from /usr/include/c++/14/string:51,
                 from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algobase.h:642:5: note: candidate: 'template<class _II, class _OI> _OI std::copy(_II, _II, _OI)'
  642 |     copy(_II __first, _II __last, _OI __result)
      |     ^~~~
/usr/include/c++/14/bits/stl_algobase.h:642:5: note:   candidate expects 3 arguments, 1 provided
In file included from /usr/include/c++/14/bits/locale_facets.h:48,
                 from /usr/include/c++/14/bits/basic_ios.h:37,
                 from /usr/include/c++/14/ios:46:
/usr/include/c++/14/bits/streambuf_iterator.h:339:5: note: candidate: 'template<class _CharT> typename __gnu_cxx::__enable_if<std::__is_char<_Tp>::__value, std::ostreambuf_iterator<_CharT> >::__type std::copy(istreambuf_iterator<_CharT>, istreambuf_iterator<_CharT>, ostreambuf_iterator<_CharT>)'
  339 |     copy(istreambuf_iterator<_CharT> __first,
      |     ^~~~
/usr/include/c++/14/bits/streambuf_iterator.h:339:5: note:   candidate expects 3 arguments, 1 provided
In file included from /usr/include/c++/14/algorithm:86,
                 from a.cc:3:
/usr/include/c++/14/pstl/glue_algorithm_defs.h:134:1: note: candidate: 'template<class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2> __pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, _ForwardIterator2> std::copy(_ExecutionPolicy&&, _ForwardIterator1, _ForwardIterator1, _ForwardIterator2)'
  134 | copy(_ExecutionPolicy&& __exec, _ForwardIterator1 __first, _ForwardIterator1 __last, _ForwardIterator2 __result);
      | ^~~~
/usr/include/c++/14/pstl/glue_algorithm_defs.h:134:1: note:   candidate expects 4 arguments, 1 provided
Language: C++

#include <iostream>
#include <string>
 
using namespace std;
 
int main(){
  int a,b;
  int count=0;
  string s,reverse_s;
  cin>>a;
  cin>>b;
  for(int i=a;i<=b;i++){
    s=to_string(i);
    reverse_s=reverse(s.begin(),s.end());
    if(s==reverse_s){
      count+=1;
    }
  }
  cout<<count<<endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:14:15: error: 'reverse' was not declared in this scope; did you mean 'reverse_s'?
   14 |     reverse_s=reverse(s.begin(),s.end());
      |               ^~~~~~~
      |               reverse_s
Language: C++

#include <iostream>
#include <string>
 
using namespace std;
 
int main(){
  int a,b;
  int count=0;
  string s;
  cin>>a;
  cin>>b;
  for(int i=a;i<=b;i++){
    s=to_string(i);
    reverse_s=reverse(s.begin(),s.end());
    if(s==reverse_s){
      count+=1;
    }
  }
  cout<<count<<endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:14:5: error: 'reverse_s' was not declared in this scope
   14 |     reverse_s=reverse(s.begin(),s.end());
      |     ^~~~~~~~~
a.cc:14:15: error: 'reverse' was not declared in this scope
   14 |     reverse_s=reverse(s.begin(),s.end());
      |               ^~~~~~~
Language: C++

#include <iostream>
#include <string>
using namespace std;

int main()
{
	int A, B;
	for(int a = 1 ; a < 9 ; a++)
	{ 
		int ans = 0;
		for (int b = 0; b < 9; b++)
		{
			for (int c = 0; c < 9; c++)
			{
				int t = 10001 * a + 1010 * b + 100 * c;
				if (A <= t && t <= B)
				{
					ans++;
				}
			}
		}
	cout << ans << endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:24:2: error: expected '}' at end of input
   24 | }
      |  ^
a.cc:6:1: note: to match this '{'
    6 | {
      | ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
int kai(string s){
	int f=1;
	forn(i,s.size()/2){
		if(s[i]!=s[s.size()-1-i])
  			f=0;
	}
	return f;
}

int main(){
	int a,b;
	cin>>a>>b;
	int ans=0;
	for(int i=a;i<=b;i++){
		ans+=kai(to_string(i));
	}
	cout<<ans<<endl;
}

Compiler output:
a.cc: In function 'int kai(std::string)':
a.cc:5:14: error: 'i' was not declared in this scope
    5 |         forn(i,s.size()/2){
      |              ^
a.cc:5:9: error: 'forn' was not declared in this scope; did you mean 'fork'?
    5 |         forn(i,s.size()/2){
      |         ^~~~
      |         fork
Language: Java

mport java.util.Scanner;

class Main{
    public static void main(String[]args){
        Scanner cin=new Scanner(System.in);
        int num1 = cin.nextInt();
        int num2 = cin.nextInt();
        int count = 0;
        for (int i = num1; i <= num2; i++) {
        	String numstr = String.valueOf(i);
        	String f, r;
        	int len = numstr.length();
        	if (len % 2 == 0) {
        		f = numstr.substring(0, len / 2);
        		r = numstr.substring(len / 2, len);
        	} else {
        		f = numstr.substring(0, len / 2);
        		r = numstr.substring(len / 2 + 1, len);
        	}
        	if (f.equals((new StringBuffer(r)).reverse().toString())) {
        		count++;
        	}
        }
        System.out.println(count);
    }
}

Compiler output:
Main.java:1: error: class, interface, enum, or record expected
mport java.util.Scanner;
^
1 error
Language: C++

#include <iostream>
#include <string>

using namespace std;

bool is_palindromic(int n) {
    string s, t;
    s = to_string(n);
    t = to_string(n);
    reverse(t.begin(), t.end());

    if (s.compare(t) == 0)
        return true;
    else
        return false;
}

int main() {
    int a, b;
    cin >> a >> b;

    int count = 0;
    for (int i = a; i <= b; i++) {
        if(is_palindromic(i))
            count++;
    }

    cout << count << endl;

    return 0;
}

Compiler output:
a.cc: In function 'bool is_palindromic(int)':
a.cc:10:5: error: 'reverse' was not declared in this scope
   10 |     reverse(t.begin(), t.end());
      |     ^~~~~~~
Language: C++

#include<iostream>
#include<stdlib.h>

using namespace std;

int main(){
  int min,max;
  cin >> min >> max;
  
  int count = 0;
  
  for(int i = min; i < max; i++){
    char ss[5];
    ss = itoa(i);
    if(ss[0] == ss[4] && ss[1] == ss[3]){
      count++;
    }
  }
  
  cout << count << endl;
  return 0;
}
    


Compiler output:
a.cc: In function 'int main()':
a.cc:14:10: error: 'itoa' was not declared in this scope
   14 |     ss = itoa(i);
      |          ^~~~
Language: C++

#include<iostream>
#include<stdlib.h>

using namespace std;

int main(){
  int min,max;
  cin >> min >> max;
  
  int count = 0;
  
  for(int i = min; i < max; i++){
    char* ss = itoa(i);
    if(ss[0] == ss[4] && ss[1] == ss[3]){
      count++;
    }
  }
  
  cout << count << endl;
  return 0;
}
    


Compiler output:
a.cc: In function 'int main()':
a.cc:13:16: error: 'itoa' was not declared in this scope
   13 |     char* ss = itoa(i);
      |                ^~~~
Language: C++

#include<iostream>
using namespace std;

int main(){
  int min,max;
  cin >> min >> max;
  
  int count = 0;
  
  for(int i = min; i < max; i++){
    char* ss = itoa(i);
    if(ss[0] == ss[4] && ss[1] == ss[3]){
      count++;
    }
  }
  
  cout << count << endl;
  return 0;
}
    


Compiler output:
a.cc: In function 'int main()':
a.cc:11:16: error: 'itoa' was not declared in this scope
   11 |     char* ss = itoa(i);
      |                ^~~~
Language: C++

#include<iostream>
using namespace std;

int main(){
  int min,max;
  cin >> min >> max;
  
  int count = 0;
  
  stringstream ss;
  
  
  for(int i = min; i < max; i++){
    char* ss = itoa(i);
    if(ss[0] == ss[4] && ss[1] == ss[3]){
      count++;
    }
  }
  
  cout << count << endl;
  return 0;
}
    


Compiler output:
a.cc: In function 'int main()':
a.cc:10:16: error: aggregate 'std::stringstream ss' has incomplete type and cannot be defined
   10 |   stringstream ss;
      |                ^~
a.cc:14:16: error: 'itoa' was not declared in this scope
   14 |     char* ss = itoa(i);
      |                ^~~~
Language: C++

#include<iostream>
using namespace std;

int main(){
  int min,max;
  cin >> min >> max;
  
  int count = 0;
  
  stringstream ss;
  
  for(int i = min; i < max; i++){
    ss << i;
    if(ss[0] == ss[4] && ss[1] == ss[3]){
      count++;
    }
  }
  
  cout << count endl;
  return 0;
}
    


Compiler output:
a.cc: In function 'int main()':
a.cc:10:16: error: aggregate 'std::stringstream ss' has incomplete type and cannot be defined
   10 |   stringstream ss;
      |                ^~
a.cc:19:16: error: expected ';' before 'endl'
   19 |   cout << count endl;
      |                ^~~~~
      |                ;
Language: C++

#include<iostream>
using name space std;

int main(){
  int min,max;
  cin >> min >> max;
  
  int count = 0;
  
  stringstream ss;
  
  for(int i = min; i < max; i++){
    ss << i;
    if(ss[0] == ss[4] && ss[1] == ss[3]){
      count++;
    }
  }
  
  cout << count endl;
  return 0;
}
    


Compiler output:
a.cc:2:7: error: expected nested-name-specifier before 'name'
    2 | using name space std;
      |       ^~~~
a.cc: In function 'int main()':
a.cc:6:3: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    6 |   cin >> min >> max;
      |   ^~~
      |   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:10:3: error: 'stringstream' was not declared in this scope; did you mean 'std::stringstream'?
   10 |   stringstream ss;
      |   ^~~~~~~~~~~~
      |   std::stringstream
In file included from /usr/include/c++/14/ios:40,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41:
/usr/include/c++/14/iosfwd:158:41: note: 'std::stringstream' declared here
  158 |   typedef basic_stringstream<char>      stringstream;
      |                                         ^~~~~~~~~~~~
a.cc:13:5: error: 'ss' was not declared in this scope
   13 |     ss << i;
      |     ^~
a.cc:19:3: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   19 |   cout << count endl;
      |   ^~~~
      |   std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
Language: C++

#include<iostream>
using name space std;

int main(){
  const int min,max;
  cin >> min >> max;
  
  int count = 0;
  
  stringstream ss;
  
  for(int i = min; i < max; i++){
    ss << i;
    if(ss[0] == ss[4] && ss[1] == ss[3]){
      count++;
    }
  }
  
  cout << count endl;
  return 0;
}
    


Compiler output:
a.cc:2:7: error: expected nested-name-specifier before 'name'
    2 | using name space std;
      |       ^~~~
a.cc: In function 'int main()':
a.cc:5:13: error: uninitialized 'const min' [-fpermissive]
    5 |   const int min,max;
      |             ^~~
a.cc:5:17: error: uninitialized 'const max' [-fpermissive]
    5 |   const int min,max;
      |                 ^~~
a.cc:6:3: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    6 |   cin >> min >> max;
      |   ^~~
      |   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:10:3: error: 'stringstream' was not declared in this scope; did you mean 'std::stringstream'?
   10 |   stringstream ss;
      |   ^~~~~~~~~~~~
      |   std::stringstream
In file included from /usr/include/c++/14/ios:40,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41:
/usr/include/c++/14/iosfwd:158:41: note: 'std::stringstream' declared here
  158 |   typedef basic_stringstream<char>      stringstream;
      |                                         ^~~~~~~~~~~~
a.cc:13:5: error: 'ss' was not declared in this scope
   13 |     ss << i;
      |     ^~
a.cc:19:3: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   19 |   cout << count endl;
      |   ^~~~
      |   std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
Language: C++

#include<iostream>
using name spave std;

int main(){
  const int min,max;
  cin >> min >> max;
  
  int count = 0;
  
  stringstream ss;
  
  for(int i = min; i < max; i++){
    ss << i;
    if(ss[0] == ss[4] && ss[1] == ss[3]){
      count++;
    }
  }
  
  cout << count endl;
  return 0;
}
    

Compiler output:
a.cc:2:7: error: expected nested-name-specifier before 'name'
    2 | using name spave std;
      |       ^~~~
a.cc: In function 'int main()':
a.cc:5:13: error: uninitialized 'const min' [-fpermissive]
    5 |   const int min,max;
      |             ^~~
a.cc:5:17: error: uninitialized 'const max' [-fpermissive]
    5 |   const int min,max;
      |                 ^~~
a.cc:6:3: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    6 |   cin >> min >> max;
      |   ^~~
      |   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:10:3: error: 'stringstream' was not declared in this scope; did you mean 'std::stringstream'?
   10 |   stringstream ss;
      |   ^~~~~~~~~~~~
      |   std::stringstream
In file included from /usr/include/c++/14/ios:40,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41:
/usr/include/c++/14/iosfwd:158:41: note: 'std::stringstream' declared here
  158 |   typedef basic_stringstream<char>      stringstream;
      |                                         ^~~~~~~~~~~~
a.cc:13:5: error: 'ss' was not declared in this scope
   13 |     ss << i;
      |     ^~
a.cc:19:3: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   19 |   cout << count endl;
      |   ^~~~
      |   std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
Language: C++

#include <iostream>
#include <vector>
#include <limits>
#include <boost/range/irange.hpp>
#include <boost/range/adaptors.hpp>

using namespace std;
using namespace boost;
using uint = unsigned int;
using ll = long long int;
using ull = unsigned long long int;

int main() {
    uint A, B, count{0};
    cin >> A >> B;
    for (auto &&i: irange(A, B+1)){
        string s{to_string(i)};
        bool flag{true};
        for (auto &&j: irange(0U, s.size())){
            if(s.at(j)!=s.at(s.size()-j-1))flag=false;
        }
        if(flag)count++;
    }
    cout << count;
    return 0;
}

Compiler output:
a.cc:4:10: fatal error: boost/range/irange.hpp: No such file or directory
    4 | #include <boost/range/irange.hpp>
      |          ^~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
Language: Java

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

Compiler output:
Main.java:2: error: illegal character: '\u00a0'
?
^
1 error
Language: C++

#include <stdio.h>
int main (void)
{
int a , b ;
scanf(”%d%d ” , &a , &b ) ;
int r = 0 ;
for ( int i = a ; i <= b ; i++)
{
int s = i % 10 , t = i / 10000 ;
int u = i / 10 % 10 , v = i / 1000 % 10;
if ( s == t&&u == v ) r++;
}
printf (”%d\n ” , r ) ;
}


Compiler output:
a.cc:5:7: error: extended character ” is not valid in an identifier
    5 | scanf(”%d%d ” , &a , &b ) ;
      |       ^
a.cc:5:13: error: extended character ” is not valid in an identifier
    5 | scanf(”%d%d ” , &a , &b ) ;
      |             ^
a.cc:13:9: error: extended character ” is not valid in an identifier
   13 | printf (”%d\n ” , r ) ;
      |         ^
a.cc:13:12: error: stray '\' in program
   13 | printf (”%d\n ” , r ) ;
      |            ^
a.cc:13:15: error: extended character ” is not valid in an identifier
   13 | printf (”%d\n ” , r ) ;
      |               ^
a.cc: In function 'int main()':
a.cc:5:7: error: '\U0000201d' was not declared in this scope
    5 | scanf(”%d%d ” , &a , &b ) ;
      |       ^
a.cc:5:9: error: 'd' was not declared in this scope
    5 | scanf(”%d%d ” , &a , &b ) ;
      |         ^
Language: C++

#include <cstdio>
using namespace std;
int main ( )
{
int a , b ;
scanf(”%d%d ” , &a , &b ) ;
int r = 0 ;
for ( int i = a ; i <= b ; i++)
{
int s = i % 10 , t = i / 10000 ;
int u = i / 10 % 10 , v = i / 1000 % 10;
if ( s == t&&u == v ) r++;

}
printf (”%d\n ” , r ) ;
}


Compiler output:
a.cc:6:7: error: extended character ” is not valid in an identifier
    6 | scanf(”%d%d ” , &a , &b ) ;
      |       ^
a.cc:6:13: error: extended character ” is not valid in an identifier
    6 | scanf(”%d%d ” , &a , &b ) ;
      |             ^
a.cc:15:9: error: extended character ” is not valid in an identifier
   15 | printf (”%d\n ” , r ) ;
      |         ^
a.cc:15:12: error: stray '\' in program
   15 | printf (”%d\n ” , r ) ;
      |            ^
a.cc:15:15: error: extended character ” is not valid in an identifier
   15 | printf (”%d\n ” , r ) ;
      |               ^
a.cc: In function 'int main()':
a.cc:6:7: error: '\U0000201d' was not declared in this scope
    6 | scanf(”%d%d ” , &a , &b ) ;
      |       ^
a.cc:6:9: error: 'd' was not declared in this scope
    6 | scanf(”%d%d ” , &a , &b ) ;
      |         ^
Language: Java

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String[] str1 = sc.nextLine().split(" ");
		int a = Integer.parseInt(str1[0]);
		int b = Integer.parseInt(str1[1]);
		int count = 0;

		for (; a < b; a++) {
			int tmp = a;
			int reverse = 0;
			while (tmp > 0) {
				int residue = tmp % 10;
				reverse = reverse * 10 + residue;
				tmp /= 10;
			}
			if (a == reverse)
				count++;
		}
		System.out.println(count);

		sc.close();

	}

}


Compiler output:
Main.java:4: error: cannot find symbol
		Scanner sc = new Scanner(System.in);
		^
  symbol:   class Scanner
  location: class Main
Main.java:4: error: cannot find symbol
		Scanner sc = new Scanner(System.in);
		                 ^
  symbol:   class Scanner
  location: class Main
2 errors
Language: C++

#include<stdio.h>
#include<string>
#include<iostream>
#include<math.h>
#include<vector>
#include<set>
using namespace std;

int main(void) {
	int A, B, num = 0;
	cin >> A >> B;
	string a,b;
	for (int i = 0;i < B-A+1;i++) {
		a = to_string(A + i);
		b = to_string(A + i);
		reverse(a.begin(), a.end());
		if (a == b)num++;
	}
	cout << num << endl;
	
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:16:17: error: 'reverse' was not declared in this scope
   16 |                 reverse(a.begin(), a.end());
      |                 ^~~~~~~
Language: C++

#include <iostream>
#include <cstdio>
#include <cstring>
#include <cstdlib>
#include <vector>
using namespace std;
vector<int>V;
int main()
{
    int i,j,vec[99999],x;vec[9999]=0;
    for(j=10000;j<=99999;j++){
        while (j){
                x=j;
   V.push_back(x% 10);
   x/= 10;
  }
  bool result  = true;
  for (i = 0; i < V.size(); i++){
   if (V[i] != V[V.size() - i - 1]){
    result = false;
    break;
   }
  }
  if(result){
    vec[j]=1;
  }
  vec[j]=vec[j-1]+vec[j];
  V.clear();
    }
    int a,b,sum;
    scanf("%d %d",&a,&b);
    sum=vec[b]-vec[a]
    printf("%d\n",sum);
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:32:22: error: expected ';' before 'printf'
   32 |     sum=vec[b]-vec[a]
      |                      ^
      |                      ;
   33 |     printf("%d\n",sum);
      |     ~~~~~~
Language: Java

import java.util.Scanner;

public class Main{
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
	        int b = sc.nextInt();
                int count = 0;
        for(x = a; x <= b; x++){
                if(x-(x%10000) == x%10 && (x%10000)-(x%1000) == (x%100)-(x%10)){
                count++;
                }
        }
		System.out.println(count);
	}
}

Compiler output:
Main.java:9: error: cannot find symbol
        for(x = a; x <= b; x++){
            ^
  symbol:   variable x
  location: class Main
Main.java:9: error: cannot find symbol
        for(x = a; x <= b; x++){
                   ^
  symbol:   variable x
  location: class Main
Main.java:9: error: cannot find symbol
        for(x = a; x <= b; x++){
                           ^
  symbol:   variable x
  location: class Main
Main.java:10: error: cannot find symbol
                if(x-(x%10000) == x%10 && (x%10000)-(x%1000) == (x%100)-(x%10)){
                   ^
  symbol:   variable x
  location: class Main
Main.java:10: error: cannot find symbol
                if(x-(x%10000) == x%10 && (x%10000)-(x%1000) == (x%100)-(x%10)){
                      ^
  symbol:   variable x
  location: class Main
Main.java:10: error: cannot find symbol
                if(x-(x%10000) == x%10 && (x%10000)-(x%1000) == (x%100)-(x%10)){
                                  ^
  symbol:   variable x
  location: class Main
Main.java:10: error: cannot find symbol
                if(x-(x%10000) == x%10 && (x%10000)-(x%1000) == (x%100)-(x%10)){
                                           ^
  symbol:   variable x
  location: class Main
Main.java:10: error: cannot find symbol
                if(x-(x%10000) == x%10 && (x%10000)-(x%1000) == (x%100)-(x%10)){
                                                     ^
  symbol:   variable x
  location: class Main
Main.java:10: error: cannot find symbol
                if(x-(x%10000) == x%10 && (x%10000)-(x%1000) == (x%100)-(x%10)){
                                                                 ^
  symbol:   variable x
  location: class Main
Main.java:10: error: cannot find symbol
                if(x-(x%10000) == x%10 && (x%10000)-(x%1000) == (x%100)-(x%10)){
                                                                         ^
  symbol:   variable x
  location: class Main
10 errors
Language: C++

#include<bits/stdc++.h>
using namespace std;
int f(int n)
{
	int x;
	int y=n;
	while(y)
	{
		x=x*10+y%10;
		y/=10;
	}
	if(n==x)
	  return 1;
	else 
	  return 0;  
}
int main()
{
	int n,m,i,s=0;;
	scanf("%d %d",&n,&m);
	for(i=n,i<=m;i++)
	{
		if(f(i)==1)
		   s++;
	}
	printf("%d",s);
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:21:25: error: expected ';' before ')' token
   21 |         for(i=n,i<=m;i++)
      |                         ^
      |                         ;
Language: C++

#include<algorithm>
#include<iostream>
#include<string.h>
#include<stdio.h>
#include<string>
#include<math.h>
#include<vector>
#include<queue>
#include<set>
#include<map>
#include<memory.h>
#include<complex>
#include<sstream>
#include<cstdio>
#include<bitset>
#include<cmath>
#include<stack>
#include<ctime>
using namespace std;
int main()
{
int i,a,t,k;
for(i=0,i<a;i++)
{
t=i;
if(t>=0&&t<10)
k=t;
else if(t>=10&&t<100)
k=t/10+(t%10)*10;
else if(t>=100&&t<1000)
k=t/100+(t%10)*100+(t%10)*10;
else if(t>=1000&&t<10000)
k=t/1000+(t%100)*1000+(t%10)*100+(t%10)*10;
if(k==t)
printf("%d",k);
}
return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:23:16: error: expected ';' before ')' token
   23 | for(i=0,i<a;i++)
      |                ^
      |                ;
Language: C++

//インクルード
#include <cstdlib>
#include <iostream>
#include <string>
#include <vector>

//型宣言
typedef long long ll;
typedef unsigned long long ull;
typedef std::string string;
typedef ll answerType;

//変数宣言
ll N;
ll M;
std::vector<string> input;
std::vector<string> Ai;
std::vector<string> Bi;
answerType answer;

//関数のプロトタイプ宣言
//入力の取得
void getInput();
//答えを求める
answerType calcAnswer();

//メイン関数
int main() {
	//入力の取得
	getInput();

	//答え
	answerType answer = calcAnswer();

	//答えの出力
	std::cout << answer << std::endl;

	//正常終了
	return EXIT_SUCCESS;
}

//入力の取得
void getInput() {
	std::cin >> N >> M;
}

//答えを求める
answerType calcAnswer() {
	ll count = 0;
	ll loopStart = N;
	ll loopEnd = M / 2 + 1;
	for(ll i=loopStart; i<loopEnd; i++) {
		if(i % 10 == 0) {
			continue;
		}
		string temp = std::to_string(i);
		std::reverse(temp.begin(), temp.end());
		if(i == std::stoll(temp)) {
			count++;
		}
	}
	return count;
}


Compiler output:
a.cc: In function 'answerType calcAnswer()':
a.cc:57:22: error: 'reverse' is not a member of 'std'
   57 |                 std::reverse(temp.begin(), temp.end());
      |                      ^~~~~~~
Language: C++

#include <stdio.h>
#include <math.h>
int a[5],b[5];
int c,d;
int p;
int main(){
scanf("%d %d",&c,&d);
for(int k=0;k<5;k++){
a[k]=(c%(int)pow(10,5-k)-c%(int)pow(10,4-k))%pow(10,4-k);
}
for(int k=0;k<5;k++){
b[k]=(d%(int)pow(10,5-k)-d%(int)pow(10,4-k))%pow(10,4-k);
}
if(a[1]<a[3]||(a[1]==a[3]&&a[0]>a[4]){
for(int l=0;l<3;l++){
p=(int)a[0]*(int)pow(10,2-l)-1;
}
}
else{
for(int l=0;l<3;l++){
p=(int)a[0]*(int)pow(10,2-l);
}
}
if(b[1]<b[3]||(b[1]==b[3]&&b[0]>b[4]){
for(int l=0;l<3;l++){
p+=(int)b[0]*(int)pow(10,2-l)-1;
}
}
else{
for(int l=0;l<3;l++){
p+=(int)b[0]*(int)pow(10,2-l);
}
}
printf("%d",p);
return 0;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:9:45: error: invalid operands of types 'int' and '__gnu_cxx::__promote<double>::__type' {aka 'double'} to binary 'operator%'
    9 | a[k]=(c%(int)pow(10,5-k)-c%(int)pow(10,4-k))%pow(10,4-k);
      |      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~
      |                         |                       |
      |                         int                     __gnu_cxx::__promote<double>::__type {aka double}
a.cc:12:45: error: invalid operands of types 'int' and '__gnu_cxx::__promote<double>::__type' {aka 'double'} to binary 'operator%'
   12 | b[k]=(d%(int)pow(10,5-k)-d%(int)pow(10,4-k))%pow(10,4-k);
      |      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~
      |                         |                       |
      |                         int                     __gnu_cxx::__promote<double>::__type {aka double}
a.cc:14:38: error: expected ')' before '{' token
   14 | if(a[1]<a[3]||(a[1]==a[3]&&a[0]>a[4]){
      |   ~                                  ^
      |                                      )
Language: C++

#include<iostream>
#include<cstdio>
#include<cstring>
#include<string>
#include<cmath>
#include<algorithm>
#include<cstdlib>
#include<utility>
#include<map>
#include<stack>
#include<set>
#include<vector>
#include<queue>
#include<deque>
#include<sstream>
#include<bitset>
#include<bits/stdc++.h>
using namespace std;
int main()
{
	int a,b,cnt;
	cin>>a>>b;
	for (int i=min(a,b);i<=max(a,b);i++)
	{
		if (PD(i)) cnt++;
	}
	cout<<cnt;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:25:21: error: 'PD' was not declared in this scope
   25 |                 if (PD(i)) cnt++;
      |                     ^~
Language: C++

#include<iostream>
#include<algorithm>
#include<string>
using namespace std;
int main()
{
int a;
int b;
int x=0;
for(int i=a;i<=b;i++)
if(i[0]==i[4] && i[1]==i[3])
x++;
cout<<x;
system ("pause");
return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:5: error: invalid types 'int[int]' for array subscript
   11 | if(i[0]==i[4] && i[1]==i[3])
      |     ^
a.cc:11:11: error: invalid types 'int[int]' for array subscript
   11 | if(i[0]==i[4] && i[1]==i[3])
      |           ^
a.cc:11:19: error: invalid types 'int[int]' for array subscript
   11 | if(i[0]==i[4] && i[1]==i[3])
      |                   ^
a.cc:11:25: error: invalid types 'int[int]' for array subscript
   11 | if(i[0]==i[4] && i[1]==i[3])
      |                         ^
Language: C++

//インクルード
#include <cstdlib>
#include <iostream>
#include <string>
#include <vector>

//型宣言
typedef long long ll;
typedef unsigned long long ull;
typedef std::string string;
typedef ll answerType;

//変数宣言
ll N;
ll M;
std::vector<string> input;
std::vector<string> Ai;
std::vector<string> Bi;
answerType answer;

//関数のプロトタイプ宣言
//入力の取得
void getInput();
//答えを求める
answerType calcAnswer();

//メイン関数
int main() {
	//入力の取得
	getInput();

	//答え
	answerType answer = calcAnswer();

	//答えの出力
	std::cout << answer << std::endl;

	//正常終了
	return EXIT_SUCCESS;
}

//入力の取得
void getInput() {
	std::cin >> N >> M;
}

//答えを求める
answerType calcAnswer() {
	ll count = 0;
	ll loopStart = N;
	ll loopEnd = M / 2 + 1;
	for(ll i=loopStart; i<loopEnd; i++) {
		if(i % 10 == 0) {
			continue;
		}
		string temp = std::to_string(i);
		if(i == atol(std::reverse(temp.begin(), temp.end()))) {
			count++;
		}
	}
	return count;
}


Compiler output:
a.cc: In function 'answerType calcAnswer()':
a.cc:57:35: error: 'reverse' is not a member of 'std'
   57 |                 if(i == atol(std::reverse(temp.begin(), temp.end()))) {
      |                                   ^~~~~~~
Language: C++

#include <stdio.h>
#include <math.h>
char a[6],b[6];
int p;
int main(){
scanf("%c %c",&a,&b);
if(a[1]<a[3]||(a[1]==a[3]&&a[0]>a[4]){
for(int l=0;l<3;l++){
p=(int)a[0]*(int)pow(10,2-l)-1;
}
else{
for(int l=0;l<3;l++){
p=(int)a[0]*(int)pow(10,2-l);
}
}
if(b[1]<b[3]||(b[1]==b[3]&&b[0]>b[4]){
for(int l=0;l<3;l++){
p+=(int)b[0]*(int)pow(10,2-l)-1;
}
else{
for(int l=0;l<3;l++){
p+=(int)b[0]*(int)pow(10,2-l);
}
}
printf("%d",p);
return 0;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:7:38: error: expected ')' before '{' token
    7 | if(a[1]<a[3]||(a[1]==a[3]&&a[0]>a[4]){
      |   ~                                  ^
      |                                      )
a.cc:27:2: error: expected statement at end of input
   27 | }
      |  ^
a.cc:27:2: error: expected '}' at end of input
a.cc:5:11: note: to match this '{'
    5 | int main(){
      |           ^
Language: Java

	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String[] text = br.readLine().split(" ");
		int[] range_numbers = { Integer.valueOf(text[0]), Integer.valueOf(text[1]) };
		int result = 0;
		for (int i = range_numbers[0]; i <= range_numbers[1]; i++) {
			String number = String.valueOf(i);
			String a = number.substring(3, 4);
			String b = number.substring(4, 5);
			if (number.substring(0, 2).equalsIgnoreCase(b + a)) result++;
		}
		System.out.println(result);
	}

Compiler output:
Main.java:1: error: unnamed classes are a preview feature and are disabled by default.
	public static void main(String[] args) throws IOException {
	              ^
  (use --enable-preview to enable unnamed classes)
1 error
Language: C++

#include<stdio.h>
int main()
{
  int head, tail;
  scanf("%d %d", &head, &tail);
  int n, count=0;
  for(n=head, n<=tail;n++)
  {
    if(
      (n%10==n/10000)&&
      ((n%100)/10==(n%10000)/1000)
      )
      count++;
  }
  printf("%d", count);
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:26: error: expected ';' before ')' token
    7 |   for(n=head, n<=tail;n++)
      |                          ^
      |                          ;
Language: C++

#include <stdio.h>
#include <math.h>
char a[6],b[6];
int p;
int main(){
for(int t=0;t<6;t++){
scanf("%c",&a[t]);
}
for(int t=0;t<6;t++){
scanf("%c",&b[t]);
}
if(a[1]<a[3]||(a[1]==a[3]&&a[0]>a[4])){
for(int l=0;l<3;l++){
p=(int)a[0]*(int)pow(10,2-l)-1;
}
else{
for(int l=0;l<3;l++){
p=(int)a[0]*(int)pow(10,2-l);
}
}
if(b[1]<b[3]||(b[1]==b[3]&&b[0]>b[4])){
for(int l=0;l<3;l++){
p+=(int)b[0]*(int)pow(10,2-l)-1;
}
else{
for(int l=0;l<3;l++){
p+=(int)b[0]*(int)pow(10,2-l);
}
}
printf("%d",p);
return 0;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:16:1: error: expected '}' before 'else'
   16 | else{
      | ^~~~
a.cc:12:39: note: to match this '{'
   12 | if(a[1]<a[3]||(a[1]==a[3]&&a[0]>a[4])){
      |                                       ^
a.cc:25:1: error: expected '}' before 'else'
   25 | else{
      | ^~~~
a.cc:21:39: note: to match this '{'
   21 | if(b[1]<b[3]||(b[1]==b[3]&&b[0]>b[4])){
      |                                       ^
Language: C++

#include <stdio.h>
#include <math.h>
char a[6],b[6];
int p;
int main(){
for(int t=0;t<6;t++){
scanf("%c",&a[t]);
}
for(int t=0;t<6;t++){
scanf("%c",&b[t]);
}
if(a[1]<a[3]||(a[1]==a[3]&&a[0]>a[4]){
for(int l=0;l<3;l++){
p=(int)a[0]*(int)pow(10,2-l)-1;
}
else{
for(int l=0;l<3;l++){
p=(int)a[0]*(int)pow(10,2-l);
}
}
if(b[1]<b[3]||(b[1]==b[3]&&b[0]>b[4]){
for(int l=0;l<3;l++){
p+=(int)b[0]*(int)pow(10,2-l)-1;
}
else{
for(int l=0;l<3;l++){
p+=(int)b[0]*(int)pow(10,2-l);
}
}
printf("%d",p);
return 0;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:12:38: error: expected ')' before '{' token
   12 | if(a[1]<a[3]||(a[1]==a[3]&&a[0]>a[4]){
      |   ~                                  ^
      |                                      )
a.cc:32:2: error: expected statement at end of input
   32 | }
      |  ^
a.cc:32:2: error: expected '}' at end of input
a.cc:5:11: note: to match this '{'
    5 | int main(){
      |           ^
Language: C++

#include <stdio.h>
#include <math.h>
char a[6],b[6];
int p;
int main(){
for(int t=0;t<6;t++){
scanf("%c %c",&a[t]);
}
for(int t=0;t<6;t++){
scanf("%c %c",&b[t]);
}
if(a[1]<a[3]||(a[1]==a[3]&&a[0]>a[4]){
for(int l=0;l<3;l++){
p=(int)a[0]*(int)pow(10,2-l)-1;
}
else{
for(int l=0;l<3;l++){
p=(int)a[0]*(int)pow(10,2-l);
}
}
if(b[1]<b[3]||(b[1]==b[3]&&b[0]>b[4]){
for(int l=0;l<3;l++){
p+=(int)b[0]*(int)pow(10,2-l)-1;
}
else{
for(int l=0;l<3;l++){
p+=(int)b[0]*(int)pow(10,2-l);
}
}
printf("%d",p);
return 0;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:12:38: error: expected ')' before '{' token
   12 | if(a[1]<a[3]||(a[1]==a[3]&&a[0]>a[4]){
      |   ~                                  ^
      |                                      )
a.cc:32:2: error: expected statement at end of input
   32 | }
      |  ^
a.cc:32:2: error: expected '}' at end of input
a.cc:5:11: note: to match this '{'
    5 | int main(){
      |           ^
Language: C++

#include<iostream>
using namespace std;

int get(int n,int number)
{
	int las = number / pow(10,n-1);
	return las % 10;
}
bool check(int number)
{
	for (int i = 0; i < 2; i++)
	{
		if (get(i + 1, number) != get(5 - i, number))
		{
			return false;
		}
	}
	return true;
}
int A, B,num=0;
int main()
{
	cin >> A >> B;
	for (int i = A; i <= B; i++)
	{
		if (check(i))
		{
			num++;
		}
	}
	cout << num;
	return 0;
}

Compiler output:
a.cc: In function 'int get(int, int)':
a.cc:6:28: error: 'pow' was not declared in this scope
    6 |         int las = number / pow(10,n-1);
      |                            ^~~
Language: Java

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();
        int sum = 0;
        for (int ct = a; ct <= b; ct++) {
            if (((ct + "").charAt(0)) == ((ct + "").charAt(4))) {
                if (((ct + "").charAt(1)) == ((ct + "").charAt(3))) {
                    sum++;
                }
            }
        }
        System.out.println(sum);
    }
}

Compiler output:
Main.java:4: error: cannot find symbol
        Scanner sc = new Scanner(System.in);
        ^
  symbol:   class Scanner
  location: class Main
Main.java:4: error: cannot find symbol
        Scanner sc = new Scanner(System.in);
                         ^
  symbol:   class Scanner
  location: class Main
2 errors
Language: Java


import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int A = sc.nextInt();
		int B = sc.nextInt();
		int count = 0;
		for (int i = A; i <= B; i++) {
			String n = String.valueOf(i);
			if (n.charAt(0) == n.charAt(4)) {
				if (n.charAt(1) == n.charAt(3)) {
					count++;
				}
			}
		}
		System.out.println(count);
	}

Compiler output:
Main.java:19: error: reached end of file while parsing
	}
	 ^
1 error
Language: C

#include <iostream>
#include <string>
#include <algorithm>
#include <vector>

int main()
{
	int  a = 0, b = 0;
	int reverse = 0;
	int remaind, tmp;
	int ans = 0;

	std::cin >> a >> b;

	for (int i = 0; i < b - a; i++) {
		tmp = a + i;
		while (tmp != 0) {
			remaind = tmp % 10;
			reverse = reverse * 10 + remaind;
			tmp /= 10;
		}
		if (reverse == a + i) {
		
			ans++;
		}
		remaind = 0;
		reverse = 0;
		tmp = 0;


	}

	std::cout << ans << std::endl;
}

Compiler output:
main.c:1:10: fatal error: iostream: No such file or directory
    1 | #include <iostream>
      |          ^~~~~~~~~~
compilation terminated.
Language: C++

#include<bits/stdc++.h>

using namespace std;

#define IOS ios::sync_with_stdio(0);cin.tie(0);

int a[5];

int main(){
	IOS;
	int a,b;
	while(cin>>a>>b){
		int ans=0;
		for(int i=a;i<=b;i++){
			for(int j=4;j>=0;j--){
				a[j]=i%10;
				i/=10;
			}
			if(a[0] == a[4] and a[1] ==  a[3]){
				ans=ans+1;
			}
			for(int k=0;k<5;k++){
				a[k]=0;
			}
		}
		cout<<ans<<endl;
	}
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:16:34: error: invalid types 'int[int]' for array subscript
   16 |                                 a[j]=i%10;
      |                                  ^
a.cc:19:29: error: invalid types 'int[int]' for array subscript
   19 |                         if(a[0] == a[4] and a[1] ==  a[3]){
      |                             ^
a.cc:19:37: error: invalid types 'int[int]' for array subscript
   19 |                         if(a[0] == a[4] and a[1] ==  a[3]){
      |                                     ^
a.cc:19:46: error: invalid types 'int[int]' for array subscript
   19 |                         if(a[0] == a[4] and a[1] ==  a[3]){
      |                                              ^
a.cc:19:55: error: invalid types 'int[int]' for array subscript
   19 |                         if(a[0] == a[4] and a[1] ==  a[3]){
      |                                                       ^
a.cc:23:34: error: invalid types 'int[int]' for array subscript
   23 |                                 a[k]=0;
      |                                  ^
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;
int a,b,z;
bool huwen(int x){
  int xx=x;
  int xt,c=1;
  while(xx>0){
    xt=xx%10;
    xx/=10
    for(int i=0;i<c;i++)
      xt*=10;
  }
  if(x==xt)return true;
  else return false;
    
int main()
{
  cin>>a>>b;
  for(int i=a;i<=b;i++)
    if(huwen(i))z++;
  cout<<z;
  system("pause");
  return 0;
}

Compiler output:
a.cc: In function 'bool huwen(int)':
a.cc:18:11: error: expected ';' before 'for'
   18 |     xx/=10
      |           ^
      |           ;
   19 |     for(int i=0;i<c;i++)
      |     ~~~    
a.cc:19:17: error: 'i' was not declared in this scope
   19 |     for(int i=0;i<c;i++)
      |                 ^
a.cc:25:9: warning: empty parentheses were disambiguated as a function declaration [-Wvexing-parse]
   25 | int main()
      |         ^~
a.cc:25:9: note: remove parentheses to default-initialize a variable
   25 | int main()
      |         ^~
      |         --
a.cc:25:9: note: or replace parentheses with braces to value-initialize a variable
a.cc:26:1: error: a function-definition is not allowed here before '{' token
   26 | {
      | ^
a.cc:33:2: error: expected '}' at end of input
   33 | }
      |  ^
a.cc:13:18: note: to match this '{'
   13 | bool huwen(int x){
      |                  ^
Language: C++

#ifdef local_mode
    #include <cstdio>
    #include <cassert>
#endif
#include <iostream>
#include <bits/stdc++.h>
#include "optimization.h"

using namespace std;

typedef long long ll;
typedef unsigned long long ull;
typedef pair<int, int> pii;
typedef vector<int> vi;
typedef vector<vector<int>> vii;
#define forn(i, n) for (int i = 0; i < (int)(n); ++i)

int main() {
#ifdef local_mode
    //#define FILENAME "test" ← defined via command line
    assert(freopen(FILENAME ".in", "r", stdin));
    assert(freopen(FILENAME ".out", "w", stdout));
#endif

    ios_base::sync_with_stdio(0), cin.tie(0);
    int a, b;
    cin >> a >> b;
    int cnt = 0;
    for (int i = a; i <= b; i++) {
        string s = to_string(i);
        bool ok = 1;
        for (int j = 0; j < s.size(); j++) {

            if (s[j] != s[s.size() - 1 - j]) {
                ok = 0;
                break;
            }
        }
        cnt += ok;
    }
    cout << cnt;

    return 0;
}







































Compiler output:
a.cc:7:10: fatal error: optimization.h: No such file or directory
    7 | #include "optimization.h"
      |          ^~~~~~~~~~~~~~~~
compilation terminated.
Language: Java

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

public class B
{
  
  public static void main(String[] args) throws IOException
  {
    BufferedReader r = new BufferedReader(new InputStreamReader(System.in), 1);
    String s = r.readLine();
    String[] sl = s.split("[\\s]+");
    int a = Integer.parseInt(sl[0]);
    int b = Integer.parseInt(sl[1]);
    int z = 0;
    for(Integer i = a; i <= b; i++)
    {
      String ss = i.toString();
      if (ss.charAt(0) == ss.charAt(4) && ss.charAt(1) == ss.charAt(3))
      {
        z++;
      }
    }
    
    System.out.println(z);
  }
  
}

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

#include"bits/stdc++.h"

int main(){
  int A,B,count=0,t;
  cin<<A<<B;
  for(int i=A;i<=B;i++){
    t=i/1000;
    if((t)==(i-t*1000)) count++;
  }
  cout<<count<<endl;
}
    

Compiler output:
a.cc: In function 'int main()':
a.cc:5:3: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    5 |   cin<<A<<B;
      |   ^~~
      |   std::cin
In file included from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:146,
                 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:10:3: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   10 |   cout<<count<<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:10:16: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   10 |   cout<<count<<endl;
      |                ^~~~
      |                std::endl
In file included from /usr/include/c++/14/istream:41,
                 from /usr/include/c++/14/sstream:40,
                 from /usr/include/c++/14/complex:45,
                 from /usr/include/c++/14/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:127:
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
Language: C++

#include <iostream>
using namespace std;

int main(int argc, const char * argv[]) {
    int A, B;
    string s, t;
    cin >> A >> B;
    
    int cnt = 0;
    for (int i = A; i <= B; i++) {
        
        s = to_string(i);
        t = s;
        reverse(t.begin(), t.end());
        if (s == t) {
            cnt++;
        }
        
    }
    cout << cnt << endl;
    return 0;
}



Compiler output:
a.cc: In function 'int main(int, const char**)':
a.cc:14:9: error: 'reverse' was not declared in this scope
   14 |         reverse(t.begin(), t.end());
      |         ^~~~~~~
Language: C++

#include <cmath>
#include <vector>
#include <cstdio>
using namespace std;

int main()
{
    int a,b,ans=0;
    cin>>a>>b;
    for (int i=a; i<=b; i++)
    {
        string s=to_string(i);
        if (s[0]==s[4] && s[1]==s[3]) ans++;
    }
    cout<<ans<<'\n';
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:5: error: 'cin' was not declared in this scope
    9 |     cin>>a>>b;
      |     ^~~
a.cc:4:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
    3 | #include <cstdio>
  +++ |+#include <iostream>
    4 | using namespace std;
a.cc:12:9: error: 'string' was not declared in this scope
   12 |         string s=to_string(i);
      |         ^~~~~~
a.cc:4:1: note: 'std::string' is defined in header '<string>'; this is probably fixable by adding '#include <string>'
    3 | #include <cstdio>
  +++ |+#include <string>
    4 | using namespace std;
a.cc:13:13: error: 's' was not declared in this scope
   13 |         if (s[0]==s[4] && s[1]==s[3]) ans++;
      |             ^
a.cc:15:5: error: 'cout' was not declared in this scope
   15 |     cout<<ans<<'\n';
      |     ^~~~
a.cc:15:5: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
Language: C++

#include <string>
#include <cstdio>
using namespace std;
int main() {
    int a, b;
    scanf("%d%d", &a, &b);
    int res = 0;
    for (int i = a; i <= b; i++) {
        string orig = to_string(i);
        string rev = orig;
        reverse(rev.begin(), rev.end());
        if (orig == rev) res++;
    }
    printf("%d\n", res);
}


Compiler output:
a.cc: In function 'int main()':
a.cc:11:9: error: 'reverse' was not declared in this scope
   11 |         reverse(rev.begin(), rev.end());
      |         ^~~~~~~
Language: C++

#include <iostream>

using namespace std;

int main() {
    int A, B;
    cin >> A >> B;

    int ans = 0;
    for (int i = A; i <= B; ++i) {
        string N = to_string(i);
        string N_rev = N;
        reverse(N_rev.begin(), N_rev.end());

        if (N == N_rev) ans++;
    }

    cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:9: error: 'reverse' was not declared in this scope
   13 |         reverse(N_rev.begin(), N_rev.end());
      |         ^~~~~~~
Language: C++

include <bits/stdc++.h>
#define rep(i,n) for(int i = 0; i < n; i++)
using namespace std;
typedef long long ll;
typedef pair<int,int> P;
 
int main()
{
	ll N,M;
	cin >> N >> M;
	if (N == 1 && M == 1) cout << 1 << endl;
	else if(N == 1 || M == 1) cout << max(N,M)-2 << endl;
	else cout << (N-2) * (M-2) << endl;
	return 0;
}

Compiler output:
a.cc:1:1: error: 'include' does not name a type
    1 | include <bits/stdc++.h>
      | ^~~~~~~
a.cc:5:9: error: 'pair' does not name a type
    5 | typedef pair<int,int> P;
      |         ^~~~
a.cc: In function 'int main()':
a.cc:10:9: error: 'cin' was not declared in this scope
   10 |         cin >> N >> M;
      |         ^~~
a.cc:11:31: error: 'cout' was not declared in this scope
   11 |         if (N == 1 && M == 1) cout << 1 << endl;
      |                               ^~~~
a.cc:11:44: error: 'endl' was not declared in this scope
   11 |         if (N == 1 && M == 1) cout << 1 << endl;
      |                                            ^~~~
a.cc:12:35: error: 'cout' was not declared in this scope
   12 |         else if(N == 1 || M == 1) cout << max(N,M)-2 << endl;
      |                                   ^~~~
a.cc:12:43: error: 'max' was not declared in this scope
   12 |         else if(N == 1 || M == 1) cout << max(N,M)-2 << endl;
      |                                           ^~~
a.cc:12:57: error: 'endl' was not declared in this scope
   12 |         else if(N == 1 || M == 1) cout << max(N,M)-2 << endl;
      |                                                         ^~~~
a.cc:13:14: error: 'cout' was not declared in this scope
   13 |         else cout << (N-2) * (M-2) << endl;
      |              ^~~~
a.cc:13:39: error: 'endl' was not declared in this scope
   13 |         else cout << (N-2) * (M-2) << endl;
      |                                       ^~~~