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

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

int main() {
	
  str a,b ;
  cin >> a >> b ;
  
  if ( a.at(0) == b.at(2) && a.at(1) == b.at(1) && a.at(2) == b.at(0) ) cout << "YES" ;
  else cout << "NO";


}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:3: error: 'str' was not declared in this scope; did you mean 'std'?
    7 |   str a,b ;
      |   ^~~
      |   std
a.cc:8:10: error: 'a' was not declared in this scope
    8 |   cin >> a >> b ;
      |          ^
a.cc:8:15: error: 'b' was not declared in this scope
    8 |   cin >> a >> b ;
      |               ^
Language: C++

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

int main(){
  string s1, s2, s3;
  cin >> s1 >> s2;
  for (int i=0; i<s1.size(); i++){
    s3[s.size()-i-1] = s1[i];
  }
  if (s2==s3){
    cout << "Yes" << endl;
  }
  else {
    cout << "NO" << endl;
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:8: error: 's' was not declared in this scope
    9 |     s3[s.size()-i-1] = s1[i];
      |        ^
Language: C++

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

int main(){
  string s1, s2, s3;
  cin >> s1 >> s2;
  for (int i=0; i<s1.size(); i++){
    s3[s.size()-i] = s1[i];
  }
  if (s2==s3){
    cout << "Yes" << endl;
  }
  else {
    cout << "NO" << endl;
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:8: error: 's' was not declared in this scope
    9 |     s3[s.size()-i] = s1[i];
      |        ^
Language: C++

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


int main(){
  vector<char> a(6);
  for(int i=0;i<6;i++){
    cin >> a.at(i);
  }
  if(a.at(0)==a.at(5)&& a.at(1)===a.at(4)&&a.at(2)==a.at(3)){
    cout <<"YES"<<endl;
  }
  else{
    cout <<"NO"<<endl;
  }
  }


Compiler output:
a.cc: In function 'int main()':
a.cc:10:34: error: expected primary-expression before '=' token
   10 |   if(a.at(0)==a.at(5)&& a.at(1)===a.at(4)&&a.at(2)==a.at(3)){
      |                                  ^
Language: Java

import java.util.*;
public class Main{
	public static void main(String[] args){
    	Scanner sc = new Scanner(System.in);
      String[][] c = new String[2][3]
      for(int i = 0;i < 2;i++){
      	for(int j = 0;j < 3;j++){
        	c[i][j] = sc.next();
        }
      }
      if( c[0][0].equals(c[1][2])&&c[0][1].equals(c[1][1])&&c[0][2].equals(c[1][0]) ){
      	System.out.println("YES");
      }else{
      	System.out.println("NO");
      }
    }
}

Compiler output:
Main.java:5: error: ';' expected
      String[][] c = new String[2][3]
                                     ^
1 error
Language: C++

#include <iostream>

int main() {
  int a, b, c, d ,e, f;
  cin >> a >> b >> c >> d >> e >> f;
  if ((a == f) and (b == e) and (c == d)) {
     cout << "YES";
  }
  else {
    cout << "NO";
  }
}


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 >> c >> d >> e >> f;
      |   ^~~
      |   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:7:6: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    7 |      cout << "YES";
      |      ^~~~
      |      std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:10:5: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   10 |     cout << "NO";
      |     ^~~~
      |     std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
Language: Java

import java.util.*;

class Main{
  public static void main(String args[]){
    Scanner sc = new Scanner(System.in);
    String s = sc.next();
    String t = sc.next();
    if(
      s.charAt(0)==t.charAt(2)&&
      s.charAt(1)==t.charAt(1)
      s.charAt(2)==t.charAt(0)
    ){
      System.out.println("YES");
    }else{
      System.out.println("NO");
    }
  }
}

Compiler output:
Main.java:10: error: ')' expected
      s.charAt(1)==t.charAt(1)
                              ^
Main.java:11: error: not a statement
      s.charAt(2)==t.charAt(0)
                 ^
Main.java:11: error: ';' expected
      s.charAt(2)==t.charAt(0)
                              ^
Main.java:14: error: 'else' without 'if'
    }else{
     ^
4 errors
Language: C++

#include<iostrem>
int main(){
	char s[4],t[4];
  	std::cin >> s >> t;
  	if(s[2]==t[0] && s[0]==t[2] && s[1]==t[1])std::cout << "YES";
 	else std::cout << "NO";
}


Compiler output:
a.cc:1:9: fatal error: iostrem: No such file or directory
    1 | #include<iostrem>
      |         ^~~~~~~~~
compilation terminated.
Language: C++

#include<iostrem>
int main(){
	char s[4],t[4];
  	std::cin >> s >> t;
  	if(s[2]==t[0] && s[0]==t[2] && s[1]==t[1])cout << "YES";
 	else cout << "NO";
}

Compiler output:
a.cc:1:9: fatal error: iostrem: No such file or directory
    1 | #include<iostrem>
      |         ^~~~~~~~~
compilation terminated.
Language: C++

#include <iostream>
using namespace std;

int main() {
  string s1, s2;
  cin >> s1 >> s2;
  reverse(s2.begin(), s2.end());
  if (s1 == s2) cout << "YES" << endl;
  else cout << "NO" << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:3: error: 'reverse' was not declared in this scope
    7 |   reverse(s2.begin(), s2.end());
      |   ^~~~~~~
Language: C++

#define rep(i,n) for(int i = 0;i < (n);++i)
#define reps(i,n) for(int i = 1;i <= (n);++i)
using namespace std;
int main(){
  string a,b;
  cin >> a >> b;
  if(a[0] == b[2] && b[0] == a[2] && a[1] == b[1]) cout << "YES\n";
  else cout << "NO\n";
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:3: error: 'string' was not declared in this scope
    5 |   string a,b;
      |   ^~~~~~
a.cc:1:1: note: 'std::string' is defined in header '<string>'; this is probably fixable by adding '#include <string>'
  +++ |+#include <string>
    1 | #define rep(i,n) for(int i = 0;i < (n);++i)
a.cc:6:3: error: 'cin' was not declared in this scope
    6 |   cin >> a >> b;
      |   ^~~
a.cc:1:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
  +++ |+#include <iostream>
    1 | #define rep(i,n) for(int i = 0;i < (n);++i)
a.cc:6:10: error: 'a' was not declared in this scope
    6 |   cin >> a >> b;
      |          ^
a.cc:6:15: error: 'b' was not declared in this scope
    6 |   cin >> a >> b;
      |               ^
a.cc:7:52: error: 'cout' was not declared in this scope
    7 |   if(a[0] == b[2] && b[0] == a[2] && a[1] == b[1]) cout << "YES\n";
      |                                                    ^~~~
a.cc:7:52: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:8:8: error: 'cout' was not declared in this scope
    8 |   else cout << "NO\n";
      |        ^~~~
a.cc:8:8: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
Language: C++

int main (void){
  
  string s , t ;
  cin >> s >> t ;
  
  if (s[0] == t [2] && s[1] == t[1] && s[2] == t[0]){
    cout << "YES" << endl;
  }else{
    cout << "NO" << endl;
  }
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:3:3: error: 'string' was not declared in this scope
    3 |   string s , t ;
      |   ^~~~~~
a.cc:4:3: error: 'cin' was not declared in this scope
    4 |   cin >> s >> t ;
      |   ^~~
a.cc:4:10: error: 's' was not declared in this scope
    4 |   cin >> s >> t ;
      |          ^
a.cc:4:15: error: 't' was not declared in this scope
    4 |   cin >> s >> t ;
      |               ^
a.cc:7:5: error: 'cout' was not declared in this scope
    7 |     cout << "YES" << endl;
      |     ^~~~
a.cc:7:22: error: 'endl' was not declared in this scope
    7 |     cout << "YES" << endl;
      |                      ^~~~
a.cc:9:5: error: 'cout' was not declared in this scope
    9 |     cout << "NO" << endl;
      |     ^~~~
a.cc:9:21: error: 'endl' was not declared in this scope
    9 |     cout << "NO" << endl;
      |                     ^~~~
Language: C++

int main (){
  
  string s , t ;
  cin >> s >> t ;
  
  if (s[0] == t [2] && s[1] == t[1] && s[2] == t[0]){
    cout << "YES" << endl;
  }else{
    cout << "NO" << endl;
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:3:3: error: 'string' was not declared in this scope
    3 |   string s , t ;
      |   ^~~~~~
a.cc:4:3: error: 'cin' was not declared in this scope
    4 |   cin >> s >> t ;
      |   ^~~
a.cc:4:10: error: 's' was not declared in this scope
    4 |   cin >> s >> t ;
      |          ^
a.cc:4:15: error: 't' was not declared in this scope
    4 |   cin >> s >> t ;
      |               ^
a.cc:7:5: error: 'cout' was not declared in this scope
    7 |     cout << "YES" << endl;
      |     ^~~~
a.cc:7:22: error: 'endl' was not declared in this scope
    7 |     cout << "YES" << endl;
      |                      ^~~~
a.cc:9:5: error: 'cout' was not declared in this scope
    9 |     cout << "NO" << endl;
      |     ^~~~
a.cc:9:21: error: 'endl' was not declared in this scope
    9 |     cout << "NO" << endl;
      |                     ^~~~
Language: C++

import math
def main():
	N = int(input())
	v = int(math.sqrt(N))
	return v*v


if __name__ == "__main__":
	main()

Compiler output:
a.cc:1:1: error: 'import' does not name a type
    1 | import math
      | ^~~~~~
a.cc:1:1: note: C++20 'import' only available with '-fmodules-ts'
Language: C++

#include <iostrem>
#include <string>
#include <algorithm>

int main() {
  std::string a, b;
  std::cin >> a >> b;
  std::reverse(b.begin(), b.end());
  if (a == b) std::cout << "YES" << std::endl;
  else std::cout << "NO" << std::endl;
  return 0;
}


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

#include<bits/stdc++.h>
using namespace std;
int main(){
  string a[2][3];
  for(int i = 0;i<2;i++){
    for(int j = 0;j<3;j++){
  cin >> a.at(i)(j);
    }
  }
  if(a[0][0]==a[1][2]&&a[1][0]==a[0][2])
  cout << "YES"  <<endl;
  else cout<< "NO"<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:12: error: request for member 'at' in 'a', which is of non-class type 'std::string [2][3]' {aka 'std::__cxx11::basic_string<char> [2][3]'}
    7 |   cin >> a.at(i)(j);
      |            ^~
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
  char a[2][3];
  for(int i = 0;i<2;i++){
    for(int j = 0;j<3;j++){
  cin >> a.at(i)(j);
    }
  }
  if(a[0][0]==a[1][2]&&a[1][0]==a[0][2])
  cout << "YES"  <<endl;
  else cout<< "NO"<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:12: error: request for member 'at' in 'a', which is of non-class type 'char [2][3]'
    7 |   cin >> a.at(i)(j);
      |            ^~
Language: C++

#include <bits/stdc++.h>

using namespace std;

int main() {
  string c1, c2;
  cin >> c1 >> c2;
  if (c1[0] == c2[2] && c[1] == c[1] && c[2] == c[0]) cout << "YES" << endl;
  else cout << "NO" << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:25: error: 'c' was not declared in this scope; did you mean 'c2'?
    8 |   if (c1[0] == c2[2] && c[1] == c[1] && c[2] == c[0]) cout << "YES" << endl;
      |                         ^
      |                         c2
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(){
　string M, Y;
  cin >> M >> Y;
  if(M.at(0)!=Y.at(2)){
    cout << "NO" << endl;
    return 0;
  }
  if(M.at(2)!=Y.at(0)){
    cout << "NO" << endl;
    return 0;
  }
  if(M.at(1)!=Y.at(1)){
    cout << "NO" << endl;
    return 0;
  }
  cout << "YES" << endl;
}

Compiler output:
a.cc:4:1: error: extended character 　 is not valid in an identifier
    4 | 　string M, Y;
      | ^
a.cc: In function 'int main()':
a.cc:4:1: error: '\U00003000string' was not declared in this scope
    4 | 　string M, Y;
      | ^~~~~~~~
a.cc:5:10: error: 'M' was not declared in this scope
    5 |   cin >> M >> Y;
      |          ^
a.cc:5:15: error: 'Y' was not declared in this scope
    5 |   cin >> M >> Y;
      |               ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(){
　string M, Y;
  cin >> M >> Y;
  if(M.at(0)!=Y.at(2)){
    cout << "NO" << endl;
    return 0;
  }
  if(M.at(2)!=Y.at(0)){
    cout << "NO" << endl;
    return 0;
  }
  if(M.at(1)!==Y.at(1)){
    cout << "NO" << endl;
    return 0;
  }
  cout << "YES" << endl;
}


Compiler output:
a.cc:4:1: error: extended character 　 is not valid in an identifier
    4 | 　string M, Y;
      | ^
a.cc: In function 'int main()':
a.cc:4:1: error: '\U00003000string' was not declared in this scope
    4 | 　string M, Y;
      | ^~~~~~~~
a.cc:5:10: error: 'M' was not declared in this scope
    5 |   cin >> M >> Y;
      |          ^
a.cc:5:15: error: 'Y' was not declared in this scope
    5 |   cin >> M >> Y;
      |               ^
a.cc:14:15: error: expected primary-expression before '=' token
   14 |   if(M.at(1)!==Y.at(1)){
      |               ^
Language: C++

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

int main() {
string X,Y;
  cin >>X>>Y;
  if(X[0]==Y[2] &&X[1]==Y[1]&&X[2]==Y[0]){
    cout <<"YES";
  }
  else {
    cotu <<"NO";
  }

}


Compiler output:
a.cc: In function 'int main()':
a.cc:11:5: error: 'cotu' was not declared in this scope
   11 |     cotu <<"NO";
      |     ^~~~
Language: Java

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

int main() {
       string s, t;
       cin >> s >> t;
       if(s[0] == t[2] && s[2] == t[0] && s[1] == t[1]) cout << "YES" << endl;
       else cout << "NO" << endl;
       return 0;
}

Compiler output:
Main.java:1: error: illegal character: '#'
#include <bits/stdc++.h>
^
Main.java:1: error: class, interface, enum, or record expected
#include <bits/stdc++.h>
         ^
Main.java:6: error: not a statement
       cin >> s >> t;
                ^
Main.java:7: error: not a statement
       if(s[0] == t[2] && s[2] == t[0] && s[1] == t[1]) cout << "YES" << endl;
                                                                      ^
Main.java:8: error: not a statement
       else cout << "NO" << endl;
                         ^
Main.java:4: error: unnamed classes are a preview feature and are disabled by default.
int main() {
^
  (use --enable-preview to enable unnamed classes)
6 errors
Language: C++

#include<iostream>
#include<bits/stdc++.h>
#include<vector>
#include<algorithm>
using namespace std;
#define int long long
int main(){
    int N;
    int count=0;
    cin >> N;
    int a[N],b[N],c[N];

    for(int i=0;i < N;i++){
        cin >> a[i];
    }
    for(int i=0;i < N;i++){
        cin >> b[i];
    }
    for(int i=0;i < N;i++){
        cin >> c[i];
    }


    sort(a,a+N);
    sort(b,b+N);
    sort(c,c+N);

    for(int i= 0;i < N;i++){
       count += (lower_bound(a,a+N,b[i])-a) * (c+N-upper_bound(c,c+N,b[i]));
    }
    cout << count << endl;
}

Compiler output:
cc1plus: error: '::main' must return 'int'
Language: C++

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

int main() {
  string a, b; cin >> a >> b;
  bool ans = true;
  for (i = 0; i < 3; i++) {
  	if (a.at(i) != b.at(2 - i)) {
    	ans = false;
  	}
  }
  if (ans) {
    cout << "YES" << endl;
  }
  else cout << "NO" << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:8: error: 'i' was not declared in this scope
    7 |   for (i = 0; i < 3; i++) {
      |        ^
Language: C++

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

int main(){
  vector<char> a(3);
  vector<char> b(3);
  for(int i = 0; i < 3; i++){
    cin >> a.at(i);
  }
  for(int i = 0; i < 3; i++){
    cin >> b.at(i);
  }
  reverse(a.begin(), a.end());
  if(a == b){
    cout << "YES" << endl;
  } else {
    cout << "NO" << endl;
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:14:3: error: 'reverse' was not declared in this scope
   14 |   reverse(a.begin(), a.end());
      |   ^~~~~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(){
  string a, b;
  cin >> a >> b;
  reverse(b.at(0), b.at(3));
  cout << (a == b ? "YES" : "NO") << endl;
  return 0;
}

Compiler output:
In file included from /usr/include/c++/14/algorithm:61,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algo.h: In instantiation of 'void std::reverse(_BIter, _BIter) [with _BIter = char]':
a.cc:6:10:   required from here
    6 |   reverse(b.at(0), b.at(3));
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algo.h:1089:63: error: no matching function for call to '__iterator_category(char&)'
 1089 |       std::__reverse(__first, __last, std::__iterator_category(__first));
      |                                       ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~
In file included from /usr/include/c++/14/bits/stl_algobase.h:65,
                 from /usr/include/c++/14/algorithm:60:
/usr/include/c++/14/bits/stl_iterator_base_types.h:239:5: note: candidate: 'template<class _Iter> constexpr typename std::iterator_traits< <template-parameter-1-1> >::iterator_category std::__iterator_category(const _Iter&)'
  239 |     __iterator_category(const _Iter&)
      |     ^~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_iterator_base_types.h:239:5: note:   template argument deduction/substitution failed:
/usr/include/c++/14/bits/stl_iterator_base_types.h: In substitution of 'template<class _Iter> constexpr typename std::iterator_traits< <template-parameter-1-1> >::iterator_category std::__iterator_category(const _Iter&) [with _Iter = char]':
/usr/include/c++/14/bits/stl_algo.h:1089:63:   required from 'void std::reverse(_BIter, _BIter) [with _BIter = char]'
 1089 |       std::__reverse(__first, __last, std::__iterator_category(__first));
      |                                       ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~
a.cc:6:10:   required from here
    6 |   reverse(b.at(0), b.at(3));
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_iterator_base_types.h:239:5: error: no type named 'iterator_category' in 'struct std::iterator_traits<char>'
  239 |     __iterator_category(const _Iter&)
      |     ^~~~~~~~~~~~~~~~~~~
Language: C++

#include <iostream>
using namespace std;
int main() {
  string a, b; bool c=1;
  cin >> a >> b;
  for (int i=0;i < 2; i++) {
    if (a.at(i)!=b.at(-1*i+3)) {
      c=0;
    }
  }
  if (c==0) cout << "NO" << endl;
  else if (c==1) cout "YES" << endl;
  return 0;
}
    

Compiler output:
a.cc: In function 'int main()':
a.cc:12:22: error: expected ';' before string constant
   12 |   else if (c==1) cout "YES" << endl;
      |                      ^~~~~~
      |                      ;
Language: C++

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

int main(void){
  string s1, s2,temp = "";
  cin >> s1 >> s2;
  for(int i<s1.length();i++){
    temp += s2[s1.length()-1-i];
  }
  if(s1 == temp) cout << "YES" << endl;
  else cout << "NO" << endl;
  
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:12: error: expected ';' before '<' token
    8 |   for(int i<s1.length();i++){
      |            ^
      |            ;
a.cc:8:12: error: expected primary-expression before '<' token
Language: C++

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

int main(){

int S, S2;
cin >> S >> S2;

for(int i = 0; i < 3; i++){ 
     if(S.at(i) != S.at(2 - i)) cout << "NO" << endl; 
     return 0;
}

cout << "YES" << endl; 

}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:11: error: request for member 'at' in 'S', which is of non-class type 'int'
   10 |      if(S.at(i) != S.at(2 - i)) cout << "NO" << endl;
      |           ^~
a.cc:10:22: error: request for member 'at' in 'S', which is of non-class type 'int'
   10 |      if(S.at(i) != S.at(2 - i)) cout << "NO" << endl;
      |                      ^~
Language: C++

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

int main(){

int S, S2;
cin >> S >> S2;

for(int i = 0; i < 3; i++){ 
     if(S[i] != S[3 - i]) cout << "NO" << endl; 
     return 0;
}

cout << "YES" << endl; 

}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:10: error: invalid types 'int[int]' for array subscript
   10 |      if(S[i] != S[3 - i]) cout << "NO" << endl;
      |          ^
a.cc:10:18: error: invalid types 'int[int]' for array subscript
   10 |      if(S[i] != S[3 - i]) cout << "NO" << endl;
      |                  ^
Language: C++

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

int main(){

int S, S2;
cin >> S >> S2;

for(int i = 0; i < 3; i++){ 
     if(S[i] != S[N - i]) cout << "NO" << endl; 
     return 0;
}

cout << "YES" << endl; 

}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:10: error: invalid types 'int[int]' for array subscript
   10 |      if(S[i] != S[N - i]) cout << "NO" << endl;
      |          ^
a.cc:10:19: error: 'N' was not declared in this scope
   10 |      if(S[i] != S[N - i]) cout << "NO" << endl;
      |                   ^
Language: C++

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

int main(){
  string s; cin>>s;
  string t; cin>>t;
  s.reverse(s.begin(),s.end());
  if(t == s){
    cout<<"YES"<<endl;
  }else{
    cout<<"NO"<<endl;
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:5: error: 'std::string' {aka 'class std::__cxx11::basic_string<char>'} has no member named 'reverse'; did you mean 'reserve'?
    7 |   s.reverse(s.begin(),s.end());
      |     ^~~~~~~
      |     reserve
Language: C++

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

int main(){
  string s; cin>>s;
  string t; cin>>t;
  if(t == s.reverse(s.begin(),s.end())){
    cout<<"YES"<<endl;
  }else{
    cout<<"NO"<<endl;
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:13: error: 'std::string' {aka 'class std::__cxx11::basic_string<char>'} has no member named 'reverse'; did you mean 'reserve'?
    8 |   if(t == s.reverse(s.begin(),s.end())){
      |             ^~~~~~~
      |             reserve
Language: C++

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

int main(){
  string s; cin>>s;
  string t; cin>>t;
  if(t == s.reverse(s.begin(),s.end())){
    cout<<"YES"<<endl;
  }else{
    cout<<"NO"<<endl;
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:13: error: 'std::string' {aka 'class std::__cxx11::basic_string<char>'} has no member named 'reverse'; did you mean 'reserve'?
    7 |   if(t == s.reverse(s.begin(),s.end())){
      |             ^~~~~~~
      |             reserve
Language: C++

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

int main(){
  string a,b; cin>>a>>b;
  reverse(b.begin(),b.end());

  if(a==b) cout<<"YES"<<endl;
  else cout<<"NO"<<endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:3: error: 'reverse' was not declared in this scope
    7 |   reverse(b.begin(),b.end());
      |   ^~~~~~~
Language: C++

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

int main() {
  vec<char> vec(6);
  for(int i=0;i<6;i++){
    cin >> vec.at(i);
  }
  if(vec.at(0) == vec.at(5) && 
     vec.at(1) == vec.at(4) &&
     vec.at(2) == vec.at(3) ) {
    cout << "YES" << endl;
  }
  else {
    cout << "NO" << endl;
  }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:5:3: error: 'vec' was not declared in this scope
    5 |   vec<char> vec(6);
      |   ^~~
a.cc:5:7: error: expected primary-expression before 'char'
    5 |   vec<char> vec(6);
      |       ^~~~
Language: C

#include <stdio.h>

int main() {
  int flag = 0;
  char board[3][4];
  scanf("%s", board[0]);
  scanf("%s", board[1]);
  for(i = 0; i < 3; i++) {
    if(board[0][i] == board[1][2-i]) {
      flag++;
    }
  }
  if(flag == 3) {
    printf("YES\n");
  } else {
    printf("NO\n");
  }
  return 0;
}


Compiler output:
main.c: In function 'main':
main.c:8:7: error: 'i' undeclared (first use in this function)
    8 |   for(i = 0; i < 3; i++) {
      |       ^
main.c:8:7: note: each undeclared identifier is reported only once for each function it appears in
Language: C

#include<stdio.h>

int main(void){
  char a,b,c,d,e,f;
  scanf("%c%c%c",&a,&b,&c);
  scanf("%c%c%c",&d,&e,&f);
  if ('a' == 'f')&&('b' == 'e')&&('c' == 'd'){
    printf("YES");
  }else{
    printf("NO");
  }
  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:7:20: error: expected identifier before '(' token
    7 |   if ('a' == 'f')&&('b' == 'e')&&('c' == 'd'){
      |                    ^
Language: Java

import java.util.*;

class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    
    String[][] c = new String[2][3];
    String[] str = new String[2];
    
    for(int i=0; i<2; i++){
      str[i] = sc.next();
      for(int j=0; j<3; j++){
        c[i][j] = str[i].charAt(j);
      }
    }

    
    if(c[0][0]==c[1][2] && c[0][1]==c[1][1] && c[0][2]==c[1][0]){
      System.out.println("YES");
    }
    else{
      System.out.println("NO");
    }
  }
}
      
      


Compiler output:
Main.java:13: error: incompatible types: char cannot be converted to String
        c[i][j] = str[i].charAt(j);
                               ^
1 error
Language: C

#include<stdio.h>

int main (void){
  char a,b,c,d,e,f;
  scanf("%c%c%c\n",a,b,c);
  scanf("%c%c%c\n",d,e,f);
  if (a == f) && (b == e) && (c == d){
    printf("YES");
  }else{
    printf("NO");
  }
}

Compiler output:
main.c: In function 'main':
main.c:7:18: error: expected identifier before '(' token
    7 |   if (a == f) && (b == e) && (c == d){
      |                  ^
Language: Java

import java.util.*;

class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    
    String[][] c = new String[2][3];
    String[] str = new String[2];
    
    for(int i=0; i++; i<2){
      str[i] = sc.next();
      for(int j=0; j++; j<3){
        c[i][j] = str[i].charAt(j);
      }
    }

    
    if(c[0][0]==c[1][2] && c[0][1]==c[1][1] && c[0][2]==c[1][0]){
      System.out.println("YES");
    }
    else{
      System.out.println("NO");
    }
  }
}
      
      

Compiler output:
Main.java:10: error: not a statement
    for(int i=0; i++; i<2){
                       ^
Main.java:12: error: not a statement
      for(int j=0; j++; j<3){
                         ^
2 errors
Language: C++

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

int main(){
  int N;
  cin >> N;
  
  int i =1;
  while (i*i <= N) {
    i++;
  }
  cout << (i-1)^2 << endl;
}




Compiler output:
a.cc: In function 'int main()':
a.cc:12:19: error: invalid operands of types 'int' and '<unresolved overloaded function type>' to binary 'operator<<'
   12 |   cout << (i-1)^2 << endl;
      |                 ~~^~~~~~~
Language: C++

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

int main(){
  int N;
  cin >> N;
  
  int i =1;
  while (i*i <= N) {
    i++;
  }
  cout << (i-1)^2 << endl;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:12:19: error: invalid operands of types 'int' and '<unresolved overloaded function type>' to binary 'operator<<'
   12 |   cout << (i-1)^2 << endl;
      |                 ~~^~~~~~~
Language: C++

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

int main(){
  int N;
  cin >> N;
  
  int i =1;
  while (i*i <= N) {
    i++;
  }
  cout << (i-1)^2 << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:12:19: error: invalid operands of types 'int' and '<unresolved overloaded function type>' to binary 'operator<<'
   12 |   cout << (i-1)^2 << endl;
      |                 ~~^~~~~~~
Language: C++

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

int main(){
  int N;
  cin >> N;
  
  int i =1;
  while (i*i <= N) {
    i++;
  }
  cout << (i-1)^2 << endl;
}
  


Compiler output:
a.cc: In function 'int main()':
a.cc:12:19: error: invalid operands of types 'int' and '<unresolved overloaded function type>' to binary 'operator<<'
   12 |   cout << (i-1)^2 << endl;
      |                 ~~^~~~~~~
Language: C++

#include <bits/stdc++.h>
2.using namespace std;
3. 
4.int main(){
5.  int N;
6.  cin >> N;
7.  
8.  int i =1;
9.  while (i*i <= N)
10.  {
11.    i++;
12.  }
13.  cout << (i-1)^2 << endl;
14.}
15.  


Compiler output:
a.cc:2:1: error: expected unqualified-id before numeric constant
    2 | 2.using namespace std;
      | ^~~~~~~
a.cc:3:1: error: expected unqualified-id before numeric constant
    3 | 3.
      | ^~
a.cc:15:1: error: expected unqualified-id before numeric constant
   15 | 15.
      | ^~~
Language: C++

#include <iostream>
using namespace std;
int main(){
  int a[6];
  for(int i=0;i<6;i++){
    cin>>a[i];
  }
  for(i=0;i<3;i++){
    if(a[i] != a[5+i]){
      cout<<"NO"<<endl;
      return 0;
    }
  }
  cout<<"YES"<<endl;
}
      

Compiler output:
a.cc: In function 'int main()':
a.cc:8:7: error: 'i' was not declared in this scope
    8 |   for(i=0;i<3;i++){
      |       ^
Language: C++

import java.io.PrintWriter;
import java.util.Scanner;

public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        PrintWriter out = new PrintWriter(System.out);

        String s1 = sc.nextLine();
        String s2 = sc.nextLine();
        if(s1.charAt(0) == s2.charAt(2) && s1.charAt(1) == s2.charAt(1) && s1.charAt(2) == s2.charAt(0)){
            out.println("YES");
        }else{
            out.println("NO");
        }
        out.flush();
    }
}

Compiler output:
a.cc:1:1: error: 'import' does not name a type
    1 | import java.io.PrintWriter;
      | ^~~~~~
a.cc:1:1: note: C++20 'import' only available with '-fmodules-ts'
a.cc:2:1: error: 'import' does not name a type
    2 | import java.util.Scanner;
      | ^~~~~~
a.cc:2:1: note: C++20 'import' only available with '-fmodules-ts'
a.cc:4:1: error: expected unqualified-id before 'public'
    4 | public class Main{
      | ^~~~~~
Language: C++

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

int main(void){

	string c1,c2;
	cin>>c1>>c2;
	if(c1[0]==c2[2&&c1[2]==c2[0]&&c1[1]==c2[1])
		cout<<"YES"<<endl;
	else
		cout<<"NO"<<endl;
	
	
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:51: error: expected ']' before ')' token
    8 |         if(c1[0]==c2[2&&c1[2]==c2[0]&&c1[1]==c2[1])
      |                                                   ^
      |                                                   ]
Language: C++

#include <iostream>
#inclue <string>
using namespace std;
int main(void){
  string s,t;
  cin >> s >> t;
  
  if(s[0] == t[2] && s[1] == t[1] && s[2] == t[0])
    cout << "YES" << endl;
  else
    cout << "NO" << endl;
  
  return 0;
}

Compiler output:
a.cc:2:2: error: invalid preprocessing directive #inclue; did you mean #include?
    2 | #inclue <string>
      |  ^~~~~~
      |  include
Language: C++

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

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

  reverse(a.begin(), a.end());
  if(a == b) cout << "YES";
  else cout << "NO";
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:3: error: 'reverse' was not declared in this scope
    9 |   reverse(a.begin(), a.end());
      |   ^~~~~~~
Language: C++

a1 = input()
a2 = input()
if a1[0] == a2[2] and a1[1] == a2[1] and a1[2] == a2[0] :
	print("YES")
else :
	print("NO")

Compiler output:
a.cc:1:1: error: 'a1' does not name a type
    1 | a1 = input()
      | ^~
Language: C++

#include <iostream>
#include <algorithm>
#include <math.h>
using namespace std;

int main(){
    char a[3],b[3];
    int k=0;
    for(int i=0; i<3; i++){
        if(a[i]==b[2-i]){
            k++
        }
    }
    if(k==3){
        cout<<"YES"<<endl;
    }
    else{
        cout<<"NO"<<endl;
    }
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:11:16: error: expected ';' before '}' token
   11 |             k++
      |                ^
      |                ;
   12 |         }
      |         ~
Language: Java

import java.util.*;
public class Main{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		String s1 = sc.next();
		String s2 = sc.next();
        for(int i = 0; i<2; i++){
            if(!s1.charAt((i+2)%3).equals(s2.charAt(i))){
                System.out.println("NO");
                return;
            }
        }
        System.out.println("YES");
	}
}

Compiler output:
Main.java:8: error: char cannot be dereferenced
            if(!s1.charAt((i+2)%3).equals(s2.charAt(i))){
                                  ^
1 error
Language: C++

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

int main() {
  
 vector<string> vec1(1);
  for(int i=0;i<vec.size();i++){
  cin >> vec1.at(i);
  }
  cout << endl;
 vector<string> vec2(1);
  for(int i=0;i<vec.size();i++){
  cin >> vec2.at(i);
  }
  cout << endl;
  reverse(vec2.begin(),vec2.end());
  
  if(vec1 == vec2){
  cout << "YES" << endl;
  }
  if(vec1 != vec2){
  cout << "NO" << endl;
  }
  
}





Compiler output:
a.cc: In function 'int main()':
a.cc:7:17: error: 'vec' was not declared in this scope; did you mean 'vec1'?
    7 |   for(int i=0;i<vec.size();i++){
      |                 ^~~
      |                 vec1
a.cc:12:17: error: 'vec' was not declared in this scope; did you mean 'vec2'?
   12 |   for(int i=0;i<vec.size();i++){
      |                 ^~~
      |                 vec2
Language: C++

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

int main() {
  
 vector<string> vec1(3);
  for(int i=0;i<3;i++){
  cin >> vec1.at(i);
  }
  
 vector<string> vec2(3);
  for(int i=0;i<3;i++){
  cin >> vec2.at(i);
  }
  
  if((vec1.at(0) == vec2.at(2)) && (vec1.at(1) == (vec2.at(1)) && (vec1.at(2) == vec2.at(0))){
  cout << "YES" << endl;
  }
  if(vec1 != vec2){
  cout << "NO" << endl;
  }
  
}





Compiler output:
a.cc: In function 'int main()':
a.cc:16:94: error: expected ')' before '{' token
   16 |   if((vec1.at(0) == vec2.at(2)) && (vec1.at(1) == (vec2.at(1)) && (vec1.at(2) == vec2.at(0))){
      |     ~                                                                                        ^
      |                                                                                              )
a.cc:23:1: error: expected primary-expression before '}' token
   23 | }
      | ^
Language: C++

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

int main() {
  
 vector<string> vec1(3);
  for(int i=0;i<3;i++){
  cin >> vec1.at(i);
  }
  
 vector<string> vec2(3);
  for(int i=0;i<3;i++){
  cin >> vec2.at(i);
  }
  
  if((vec1.at(0) == vec2.at(2)) && (vec1.at(1) == (vec2.at(1)) && (vec1.at(2) == vec2.at(0)) ){
  cout << "YES" << endl;
  }
  if(vec1 != vec2){
  cout << "NO" << endl;
  }
  
}




Compiler output:
a.cc: In function 'int main()':
a.cc:16:95: error: expected ')' before '{' token
   16 |   if((vec1.at(0) == vec2.at(2)) && (vec1.at(1) == (vec2.at(1)) && (vec1.at(2) == vec2.at(0)) ){
      |     ~                                                                                         ^
      |                                                                                               )
a.cc:23:1: error: expected primary-expression before '}' token
   23 | }
      | ^
Language: C++

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

int main() {
  
 vector<string> vec1(3);
  for(int i=0;i<3;i++){
  cin >> vec1.at(i);
  }
  
 vector<string> vec2(3);
  for(int i=0;i<3;i++){
  cin >> vec2.at(i);
  }
  
  if((vec1.at(0) == vec2.at(2)) && (vec1.at(1) == (vec2.at(1)) && (vec1.at(2) == vec.at(0)) ){
  cout << "YES" << endl;
  }
  if(vec1 != vec2){
  cout << "NO" << endl;
  }
  
}



Compiler output:
a.cc: In function 'int main()':
a.cc:16:82: error: 'vec' was not declared in this scope; did you mean 'vec2'?
   16 |   if((vec1.at(0) == vec2.at(2)) && (vec1.at(1) == (vec2.at(1)) && (vec1.at(2) == vec.at(0)) ){
      |                                                                                  ^~~
      |                                                                                  vec2
a.cc:16:94: error: expected ')' before '{' token
   16 |   if((vec1.at(0) == vec2.at(2)) && (vec1.at(1) == (vec2.at(1)) && (vec1.at(2) == vec.at(0)) ){
      |     ~                                                                                        ^
      |                                                                                              )
a.cc:23:1: error: expected primary-expression before '}' token
   23 | }
      | ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  char a,b,c,d,e,f;
  cin>>a>>b>>c>>d>>e>>f;
  if (a==f&&b=e##c=d){cout<<"YES"<<endl;}
  else{cout<<"NO"<<endl;}
}


Compiler output:
a.cc:7:16: error: stray '##' in program
    7 |   if (a==f&&b=e##c=d){cout<<"YES"<<endl;}
      |                ^~
a.cc: In function 'int main()':
a.cc:7:11: error: lvalue required as left operand of assignment
    7 |   if (a==f&&b=e##c=d){cout<<"YES"<<endl;}
      |       ~~~~^~~
a.cc:7:16: error: expected ')' before 'c'
    7 |   if (a==f&&b=e##c=d){cout<<"YES"<<endl;}
      |      ~         ^ ~
      |                )
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  string a,b,c,d,e,f; cin >> a >> b>>c>>d>>e>>f;
  if (a==f&&b==e&&c==d)
  {cout<<YES<<endl;}
  else {cout << NO<<endl;}
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:10: error: 'YES' was not declared in this scope
    7 |   {cout<<YES<<endl;}
      |          ^~~
a.cc:8:17: error: 'NO' was not declared in this scope
    8 |   else {cout << NO<<endl;}
      |                 ^~
Language: C++

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

int main() {
  
 vector<string> vec1(3);
  for(int i=0;i<3;i++){
  cin >> vec1.at(i);
  }
  
 vector<string> vec2(3);
  for(int i=0;i<3;i++){
  cin >> vec2.at(i);
  }
  reverse(vec2.begin(),vec2end());
  
  if(vec1 == vec2){
  cout << "YES" << endl;
  }
  if(vec1 != vec2){
  cout << "NO" << endl;
  }
  
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:24: error: 'vec2end' was not declared in this scope; did you mean 'vec2'?
   15 |   reverse(vec2.begin(),vec2end());
      |                        ^~~~~~~
      |                        vec2
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(){
  string s,t;
  cin>>s>>t;
  reverse(t.begin(),t.end());
  if(s==t)cout<<'YES'<<endl;
  else court<<'NO'<<endl;
}

Compiler output:
a.cc:7:17: warning: multi-character character constant [-Wmultichar]
    7 |   if(s==t)cout<<'YES'<<endl;
      |                 ^~~~~
a.cc:8:15: warning: multi-character character constant [-Wmultichar]
    8 |   else court<<'NO'<<endl;
      |               ^~~~
a.cc: In function 'int main()':
a.cc:8:8: error: 'court' was not declared in this scope
    8 |   else court<<'NO'<<endl;
      |        ^~~~~
Language: C++

#include <iostream>
#include <bits/stdc++.h>
using namespace std;
int main() {
    char a,b,c,d,e,f;
    cin >> a >> b >> c >> d >> e >> f;
    if(a == f && b == e && c == d){
        cout << "YES" << endl;
    }else{
        cout << "NO" << endl;
    }

Compiler output:
a.cc: In function 'int main()':
a.cc:11:6: error: expected '}' at end of input
   11 |     }
      |      ^
a.cc:4:12: note: to match this '{'
    4 | int main() {
      |            ^
Language: C++

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

int main() {
  string C1, C2;
  cin >> C1 >> C2;

  if(C1.at[0] == C2.at[2] && C1.at[1] == C2.at[1] && C1.at[2] == C2.at[0]){
    cout << "YES";
  }else{
    "NO";
  }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:11: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
    8 |   if(C1.at[0] == C2.at[2] && C1.at[1] == C2.at[1] && C1.at[2] == C2.at[0]){
      |           ^
a.cc:8:23: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
    8 |   if(C1.at[0] == C2.at[2] && C1.at[1] == C2.at[1] && C1.at[2] == C2.at[0]){
      |                       ^
a.cc:8:35: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
    8 |   if(C1.at[0] == C2.at[2] && C1.at[1] == C2.at[1] && C1.at[2] == C2.at[0]){
      |                                   ^
a.cc:8:47: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
    8 |   if(C1.at[0] == C2.at[2] && C1.at[1] == C2.at[1] && C1.at[2] == C2.at[0]){
      |                                               ^
a.cc:8:59: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
    8 |   if(C1.at[0] == C2.at[2] && C1.at[1] == C2.at[1] && C1.at[2] == C2.at[0]){
      |                                                           ^
a.cc:8:71: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
    8 |   if(C1.at[0] == C2.at[2] && C1.at[1] == C2.at[1] && C1.at[2] == C2.at[0]){
      |                                                                       ^
Language: C

#include <stdio.h>

int
main(int argc, char *argv[])
{
  char c[3][4];
  for(int i = 0; i < 2; i++){
    scanf("%s", c[i]);
  }
  
  int l = 0;
  for(int i = 0; i < 3; i++){
    if(a[0][i] == a[1][2 - i]){
      l++;
    }
  }
  
  if(l == 3){
    printf("Yes\n");
  }
  else{
    printf("No\n");
  }
  
  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:13:8: error: 'a' undeclared (first use in this function)
   13 |     if(a[0][i] == a[1][2 - i]){
      |        ^
main.c:13:8: note: each undeclared identifier is reported only once for each function it appears in
Language: C++

#include <bits/stdc++.h>
#define ALL(v) v.begin(), v.end()
#define rep(i, n) for(int i = 0; i < (int)(n); i++)
using namespace std;
typedef long long ll;

int main() {
char a,b,c,d,e,f;
  cin>>a>>b>>c>>d>>e>>f;
  if(a==f&&b==e&&c==d){
    cout<<"YES"<<endl;
    else
      cout<<"NO"<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:5: error: expected '}' before 'else'
   12 |     else
      |     ^~~~
a.cc:10:23: note: to match this '{'
   10 |   if(a==f&&b==e&&c==d){
      |                       ^
Language: C++

#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
typedef long long unsigned int ll;
 
int main() {
 
  string a,b;
  cin >> a;
  cin >>b;
  
  b.reverse();
  if(a==b){
    cout << "YES" << endl;
  }else{
    cout << "NO" << endl;
  }
  
   return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:13:5: error: 'std::string' {aka 'class std::__cxx11::basic_string<char>'} has no member named 'reverse'; did you mean 'reserve'?
   13 |   b.reverse();
      |     ^~~~~~~
      |     reserve
Language: Java

#include<iostream>
#include <algorithm>
#include <string>
#include<math.h>
#define rep(i,n)for(int i=0;i<n;i++)
using namespace std;
int main() {
    string a, b;
    cin >> a >> b;
    if (a[0] == b[2] && a[1] == b[1] && a[2] == b[0]) {
        cout << "YES" << endl;
    }
    else {
        cout << "NO" << endl;
    }
    return 0;
}

Compiler output:
Main.java:1: error: illegal character: '#'
#include<iostream>
^
Main.java:2: error: illegal character: '#'
#include <algorithm>
^
Main.java:3: error: illegal character: '#'
#include <string>
^
Main.java:4: error: illegal character: '#'
#include<math.h>
^
Main.java:5: error: illegal character: '#'
#define rep(i,n)for(int i=0;i<n;i++)
^
Main.java:5: error: class, interface, enum, or record expected
#define rep(i,n)for(int i=0;i<n;i++)
                            ^
Main.java:5: error: class, interface, enum, or record expected
#define rep(i,n)for(int i=0;i<n;i++)
                                ^
Main.java:9: error: not a statement
    cin >> a >> b;
             ^
Main.java:11: error: not a statement
        cout << "YES" << endl;
                      ^
Main.java:14: error: not a statement
        cout << "NO" << endl;
                     ^
Main.java:7: error: unnamed classes are a preview feature and are disabled by default.
int main() {
^
  (use --enable-preview to enable unnamed classes)
11 errors
Language: C

#include<stdio.h>

int main(){
  char c1[3],c2[3];
  scanf(%s", c1);
  scanf(%s", c2);
  
  if(c1[0]==c2[2] && c1[1]==c2[1] && c1[2]==c2[0]) printf("YES");
else printf("NO");
  return 0;
}



Compiler output:
main.c: In function 'main':
main.c:5:9: error: expected expression before '%' token
    5 |   scanf(%s", c1);
      |         ^
main.c:5:11: warning: missing terminating " character
    5 |   scanf(%s", c1);
      |           ^
main.c:5:11: error: missing terminating " character
    5 |   scanf(%s", c1);
      |           ^~~~~~~
main.c:6:11: warning: missing terminating " character
    6 |   scanf(%s", c2);
      |           ^
main.c:6:11: error: missing terminating " character
    6 |   scanf(%s", c2);
      |           ^~~~~~~
main.c:11:1: error: expected declaration or statement at end of input
   11 | }
      | ^
Language: C

#include<stdio.h>

int main(){
  char c1[3],c2[3];
  scanf(%s", &c1);
  scanf(%s", &c2);
  
  if(c1[0]==c2[2] && c1[1]==c2[1] && c1[2]==c2[0]) printf("YES");
else printf("NO");
  return 0;
}


Compiler output:
main.c: In function 'main':
main.c:5:9: error: expected expression before '%' token
    5 |   scanf(%s", &c1);
      |         ^
main.c:5:11: warning: missing terminating " character
    5 |   scanf(%s", &c1);
      |           ^
main.c:5:11: error: missing terminating " character
    5 |   scanf(%s", &c1);
      |           ^~~~~~~~
main.c:6:11: warning: missing terminating " character
    6 |   scanf(%s", &c2);
      |           ^
main.c:6:11: error: missing terminating " character
    6 |   scanf(%s", &c2);
      |           ^~~~~~~~
main.c:11:1: error: expected declaration or statement at end of input
   11 | }
      | ^
Language: C

#include<stdio.h>

int main(){
  char c1[],c2[];
  scanf(%s", &c1);
  scanf(%s", &c2);
  
  if(c1[0]==c2[2] && c1[1]==c2[1] && c1[2]==c2[0]) printf("YES");
else printf("NO");
  return 0;
}


Compiler output:
main.c: In function 'main':
main.c:4:8: error: array size missing in 'c1'
    4 |   char c1[],c2[];
      |        ^~
main.c:4:13: error: array size missing in 'c2'
    4 |   char c1[],c2[];
      |             ^~
main.c:5:9: error: expected expression before '%' token
    5 |   scanf(%s", &c1);
      |         ^
main.c:5:11: warning: missing terminating " character
    5 |   scanf(%s", &c1);
      |           ^
main.c:5:11: error: missing terminating " character
    5 |   scanf(%s", &c1);
      |           ^~~~~~~~
main.c:6:11: warning: missing terminating " character
    6 |   scanf(%s", &c2);
      |           ^
main.c:6:11: error: missing terminating " character
    6 |   scanf(%s", &c2);
      |           ^~~~~~~~
main.c:11:1: error: expected declaration or statement at end of input
   11 | }
      | ^
Language: C++

#include<iostream>
#include<string>
using namespace std;
int main()
{
    string C_1;
    string C_2;

    cin >> C_1;
    cin >> C_2;

    reverse(C_2.begin(), C_2.end())
    if(C_1 == C_2){
      cout << "YES";
    }else{
      cout << "NO";
    }


    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:12:5: error: 'reverse' was not declared in this scope
   12 |     reverse(C_2.begin(), C_2.end())
      |     ^~~~~~~
a.cc:15:6: error: 'else' without a previous 'if'
   15 |     }else{
      |      ^~~~
Language: C++

#include<iostream>
using namespace std;
int main()
{
    string C_1;
    string C_2;

    cin >> C_1;
    cin >> C_2;

    reverse(C_2.begin(), C_2.end())
    if(C_1 == C_2){
      cout << "YES";
    }else{
      cout << "NO";
    }


    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:11:5: error: 'reverse' was not declared in this scope
   11 |     reverse(C_2.begin(), C_2.end())
      |     ^~~~~~~
a.cc:14:6: error: 'else' without a previous 'if'
   14 |     }else{
      |      ^~~~