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

#include <bits/stdc++.h>
using namespace std;
int main(){
  string A, B, C;
  cin >> A >> B >> C;
  if(A[A.size()-1] == B[0] && B[B.size()-1] == C[0]){
    cout << "YES" << endl;
  }
  else count << "NO" << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:14: error: invalid operands of types '<unresolved overloaded function type>' and 'const char [3]' to binary 'operator<<'
    9 |   else count << "NO" << endl;
      |        ~~~~~~^~~~~~~
Language: C++

int main(){
  string A, B, C;
  cin >> A >> B >> C;
  if(A[A.size()-1] == B[0] && B[B.size()-1] == C[0]){
    cout << "YES" << endl;
  }
  else count << "NO" << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:2:3: error: 'string' was not declared in this scope
    2 |   string A, B, C;
      |   ^~~~~~
a.cc:3:3: error: 'cin' was not declared in this scope
    3 |   cin >> A >> B >> C;
      |   ^~~
a.cc:3:10: error: 'A' was not declared in this scope
    3 |   cin >> A >> B >> C;
      |          ^
a.cc:3:15: error: 'B' was not declared in this scope
    3 |   cin >> A >> B >> C;
      |               ^
a.cc:3:20: error: 'C' was not declared in this scope
    3 |   cin >> A >> B >> C;
      |                    ^
a.cc:5:5: error: 'cout' was not declared in this scope
    5 |     cout << "YES" << endl;
      |     ^~~~
a.cc:5:22: error: 'endl' was not declared in this scope
    5 |     cout << "YES" << endl;
      |                      ^~~~
a.cc:7:8: error: 'count' was not declared in this scope
    7 |   else count << "NO" << endl;
      |        ^~~~~
a.cc:7:25: error: 'endl' was not declared in this scope
    7 |   else count << "NO" << endl;
      |                         ^~~~
Language: C++

int main(){
  string A, B, C;
  cin >> A >> B >> C;
  if(A[A.size()-1] == B[0] && B[B.size()-1] == C[0]){
    cout << "YES" << endl;
  }
  else count << "NO" << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:2:3: error: 'string' was not declared in this scope
    2 |   string A, B, C;
      |   ^~~~~~
a.cc:3:3: error: 'cin' was not declared in this scope
    3 |   cin >> A >> B >> C;
      |   ^~~
a.cc:3:10: error: 'A' was not declared in this scope
    3 |   cin >> A >> B >> C;
      |          ^
a.cc:3:15: error: 'B' was not declared in this scope
    3 |   cin >> A >> B >> C;
      |               ^
a.cc:3:20: error: 'C' was not declared in this scope
    3 |   cin >> A >> B >> C;
      |                    ^
a.cc:5:5: error: 'cout' was not declared in this scope
    5 |     cout << "YES" << endl;
      |     ^~~~
a.cc:5:22: error: 'endl' was not declared in this scope
    5 |     cout << "YES" << endl;
      |                      ^~~~
a.cc:7:8: error: 'count' was not declared in this scope
    7 |   else count << "NO" << endl;
      |        ^~~~~
a.cc:7:25: error: 'endl' was not declared in this scope
    7 |   else count << "NO" << endl;
      |                         ^~~~
Language: C++

#include<iostrem>
#include<string>
using namespace std;
int main(){
  string a,b,c;
  cin>>a>>b>>c;
  if(a[a.size()-1]==b[0]&&b[b.size()-1]==c[0]){
    cout<<"YES"<<endl;
  }
  else{
    cout<<"NO"<<endl;
  }
  return 0;
}

Compiler output:
a.cc:1:9: 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,B,C;
  	cin >> A >> B >> C;
  	
  	if((A[A.size()]==B[0])&&(B[B.size]==C[0])){
    	cout << "YES" <<endl
    }else cout << "NO" <<endl;


}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:35: error: invalid use of non-static member function 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size() const [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>; size_type = long unsigned int]'
    8 |         if((A[A.size()]==B[0])&&(B[B.size]==C[0])){
      |                                   ^
In file included from /usr/include/c++/14/string:54,
                 from /usr/include/c++/14/bitset:52,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:52,
                 from a.cc:1:
/usr/include/c++/14/bits/basic_string.h:1076:7: note: declared here
 1076 |       size() const _GLIBCXX_NOEXCEPT
      |       ^~~~
a.cc:9:29: error: expected ';' before '}' token
    9 |         cout << "YES" <<endl
      |                             ^
      |                             ;
   10 |     }else cout << "NO" <<endl;
      |     ~
Language: C++

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

int main(){
	string A,B,C;
  	cin >> A >> B >> C;
  	
  	if((A.end==B.begin)&&(B.end==C.begin)){
    	cout << "YES" <<endl;
    }else cout << "NO" <<endl;


}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:18: error: invalid operands of types '<unresolved overloaded function type>' and '<unresolved overloaded function type>' to binary 'operator=='
    8 |         if((A.end==B.begin)&&(B.end==C.begin)){
      |             ~~~~~^~~~~~~~~
      |               |      |
      |               |      <unresolved overloaded function type>
      |               <unresolved overloaded function type>
a.cc:8:36: error: invalid operands of types '<unresolved overloaded function type>' and '<unresolved overloaded function type>' to binary 'operator=='
    8 |         if((A.end==B.begin)&&(B.end==C.begin)){
      |                               ~~~~~^~~~~~~~~
      |                                 |      |
      |                                 |      <unresolved overloaded function type>
      |                                 <unresolved overloaded function type>
Language: C++

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

int main(){
	string A,B,C;
  	cin >> A >> B >> C;
  	
  	if((A.end==B.begin)&&(B.end==C.begin)){
    	cout << "YES" <<endl
    }else cout << "NO" <<endl;


}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:18: error: invalid operands of types '<unresolved overloaded function type>' and '<unresolved overloaded function type>' to binary 'operator=='
    8 |         if((A.end==B.begin)&&(B.end==C.begin)){
      |             ~~~~~^~~~~~~~~
      |               |      |
      |               |      <unresolved overloaded function type>
      |               <unresolved overloaded function type>
a.cc:8:36: error: invalid operands of types '<unresolved overloaded function type>' and '<unresolved overloaded function type>' to binary 'operator=='
    8 |         if((A.end==B.begin)&&(B.end==C.begin)){
      |                               ~~~~~^~~~~~~~~
      |                                 |      |
      |                                 |      <unresolved overloaded function type>
      |                                 <unresolved overloaded function type>
a.cc:9:29: error: expected ';' before '}' token
    9 |         cout << "YES" <<endl
      |                             ^
      |                             ;
   10 |     }else cout << "NO" <<endl;
      |     ~
Language: C

#include<stdio.h>
 
int main()
{
  char A[11],B[11],C[11];
  int a,b,i;
  
  fgets(A,sizeof(A),stdin);
  fgets(B,sizeof(B),stdin);
  fgets(C,sizeof(C),stdin);
  
  for(i=0;i<10;i++){
	if(A[i]=='\0'){
      a=i-1;
      break;
    }
    
   for(i=0;i<10;i++){
	if(B[i]=='\0'){
      b=i-1;
      break;
    }
  
  if(A[a]==B[0]){
    if(B[b]==C[0]){
      printf("YES");
    }
  }else{
    printf("NO");
  }
  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:32:1: error: expected declaration or statement at end of input
   32 | }
      | ^
main.c:32:1: error: expected declaration or statement at end of input
Language: C

#include<stido.h>
 
int main()
{
  char A[11],B[11],C[11];
  int a,b,c,i;
  
  fgets(A,sizeof(A),stdin);
  fgets(B,sizeof(B),stdin);
  fgets(C,sizeof(C),stdin);
  
  for(i=0;i<10;i++){
	if(A[i]=='\0'){
      a=i-1;
      break;
    }
    
   for(i=0;i<10;i++){
	if(B[i]=='\0'){
      b=i-1;
      break;
    }
  
  if(A[a]==B[0]){
    if(B[b]==C[0]){
      printf("YES");
    }
  }else{
    printf("NO");
  }
  return 0;
}

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

#include<stido.h>

int main()
{
  char A[11],B[11],C[11];
  fgets(A,sizeof(A),stdin);
  fgets(B,sizeof(B),stdin);
  fgets(C,sizeof(C),stdin);
  
  if(A[9]==B[0]){
    if(B[9]==C[0]){
      printf("YES");
    }
  }else{
    printf("NO");
  }
  return 0;
}

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

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

int main(){
  string A,B,C;
  cin>>A>>B>>C;
  int sizea,sizeb;
  sizea = sizeof(A);
  sizeb = sizeof(B)
  if((A[sizea-1]==B[0])&&(B[sizeb-1]==C[0])){
    cout<<"Yes";
  }else{
    cout<<"No";
  }
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:20: error: expected ';' before 'if'
    9 |   sizeb = sizeof(B)
      |                    ^
      |                    ;
   10 |   if((A[sizea-1]==B[0])&&(B[sizeb-1]==C[0])){
      |   ~~                
a.cc:12:4: error: 'else' without a previous 'if'
   12 |   }else{
      |    ^~~~
Language: C++

#include <iostream>
#include <string>

using namespace std;

int main(){
  stirng A, B, C;
  cin >> A >> B >> C;
  cout << ((A.end() == B.begin() && B.end() == C.begin())?"YES":"NO") << endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:3: error: 'stirng' was not declared in this scope
    7 |   stirng A, B, C;
      |   ^~~~~~
a.cc:8:10: error: 'A' was not declared in this scope
    8 |   cin >> A >> B >> C;
      |          ^
a.cc:8:15: error: 'B' was not declared in this scope
    8 |   cin >> A >> B >> C;
      |               ^
a.cc:8:20: error: 'C' was not declared in this scope
    8 |   cin >> A >> B >> C;
      |                    ^
Language: Java

#include<stdio.h>
#include<string.h>
int main(){
    char a[100],b[100],c[100];
    scanf("%s%s%s",a,b,c);
    int len1 = strlen(a),len2 = strlen(b);
    if(a[len1-1]==b[0] && b[len2-1]==c[0])printf("YES\n");
    else printf("NO\n");
}

Compiler output:
Main.java:1: error: illegal character: '#'
#include<stdio.h>
^
Main.java:1: error: class, interface, enum, or record expected
#include<stdio.h>
        ^
Main.java:2: error: illegal character: '#'
#include<string.h>
^
Main.java:5: error: class, interface, enum, or record expected
    scanf("%s%s%s",a,b,c);
    ^
Main.java:6: error: unnamed classes are a preview feature and are disabled by default.
    int len1 = strlen(a),len2 = strlen(b);
    ^
  (use --enable-preview to enable unnamed classes)
Main.java:7: error: class, interface, enum, or record expected
    if(a[len1-1]==b[0] && b[len2-1]==c[0])printf("YES\n");
    ^
Main.java:8: error: class, interface, enum, or record expected
    else printf("NO\n");
    ^
Main.java:9: error: class, interface, enum, or record expected
}
^
8 errors
Language: Java

import java.util.*;
class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String a = sc.next();
        String b = sc.next();
        String c = sc.next();
        char a = a.charAt(a.length() - 1);
        char b1 = b.charAt(0);
        char b2 = b.charAt(b.length() - 1);
        char c = c.charAt(0);
        if(a == b1 && b2 == c) {
            System.out.println("YES");
        }else {
            System.out.println("NO");
        }
    }
}

Compiler output:
Main.java:8: error: variable a is already defined in method main(String[])
        char a = a.charAt(a.length() - 1);
             ^
Main.java:8: error: char cannot be dereferenced
        char a = a.charAt(a.length() - 1);
                           ^
Main.java:8: error: char cannot be dereferenced
        char a = a.charAt(a.length() - 1);
                  ^
Main.java:11: error: variable c is already defined in method main(String[])
        char c = c.charAt(0);
             ^
Main.java:11: error: char cannot be dereferenced
        char c = c.charAt(0);
                  ^
5 errors
Language: C++

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

int main (){
    string a, b, c;
    cin >> a >> b >> c;
    if(b[0]==a[(int)(a.length())-1] && b[(int)(b.length())-1]==c[0]){
        cout << "YES" << endl;
    }else {
        cout << "NO" << endl;
    }

Compiler output:
a.cc: In function 'int main()':
a.cc:12:6: error: expected '}' at end of input
   12 |     }
      |      ^
a.cc:5:12: note: to match this '{'
    5 | int main (){
      |            ^
Language: C++

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

int main(void)
{
    string a,b,c;
    bool judge = true;
    cin >> a >> b >> c;
    if(a[a.length() - 1] != b[0] || b[b.length() - 1] != c[0]){judge = false;}
    cout << if(judge){"YES";}else{"NO";} << endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:13: error: expected primary-expression before 'if'
   12 |     cout << if(judge){"YES";}else{"NO";} << endl;
      |             ^~
a.cc:12:30: error: 'else' without a previous 'if'
   12 |     cout << if(judge){"YES";}else{"NO";} << endl;
      |                              ^~~~
a.cc:12:42: error: expected primary-expression before '<<' token
   12 |     cout << if(judge){"YES";}else{"NO";} << endl;
      |                                          ^~
Language: C++

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

int main(void)
{
    string a,b,c;
    bool judge = true;
    cin >> a >> b >> c;
    if(a[a.length() - 1] != b[0] || b[b.length() - 1] != c[0]){judge = false;}
    cout << if(judge){"YES"}else{"NO"} << endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:13: error: expected primary-expression before 'if'
   12 |     cout << if(judge){"YES"}else{"NO"} << endl;
      |             ^~
a.cc:12:29: error: 'else' without a previous 'if'
   12 |     cout << if(judge){"YES"}else{"NO"} << endl;
      |                             ^~~~
a.cc:12:38: error: expected ';' before '}' token
   12 |     cout << if(judge){"YES"}else{"NO"} << endl;
      |                                      ^
      |                                      ;
a.cc:12:40: error: expected primary-expression before '<<' token
   12 |     cout << if(judge){"YES"}else{"NO"} << endl;
      |                                        ^~
Language: C++

// https://atcoder.jp/contests/

#include <iostream>
using namespace std;

int main()
{
  /* Magic word */
  cin.tie(0);
  ios::sync_with_stdio(false);
  /* ---------- */

  string a, b, c, r;

  cin >> a >> b >> c;

  r = a[a.length - 1] == b[0] && b[b.length - 1] == c[0] ? "YES" : "NO";

  cout << r << "\n";

  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:17:11: error: invalid use of member function 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::length() const [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>; size_type = long unsigned int]' (did you forget the '()' ?)
   17 |   r = a[a.length - 1] == b[0] && b[b.length - 1] == c[0] ? "YES" : "NO";
      |         ~~^~~~~~
      |                 ()
a.cc:17:38: error: invalid use of member function 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::length() const [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>; size_type = long unsigned int]' (did you forget the '()' ?)
   17 |   r = a[a.length - 1] == b[0] && b[b.length - 1] == c[0] ? "YES" : "NO";
      |                                    ~~^~~~~~
      |                                            ()
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
  string a,b,c;cin>>a>>b>>c;
  d=a.size()-1;e=b.size()-1;
  if(a[d]==b[0]&b[e]==c[0])cout<<"YES";else cout<<"NO";}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:3: error: 'd' was not declared in this scope
    5 |   d=a.size()-1;e=b.size()-1;
      |   ^
a.cc:5:16: error: 'e' was not declared in this scope
    5 |   d=a.size()-1;e=b.size()-1;
      |                ^
Language: C++

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

int main(){
  string a, b, c;
  
  cin >> a >> b >> c;
  
  if(a[a.lenght()-1] == b[0] && b[b.length()-1] == c[0]){
    cout << "YES" << endl;
  } else {
    cout << "NO" << endl;
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:10: error: 'std::string' {aka 'class std::__cxx11::basic_string<char>'} has no member named 'lenght'; did you mean 'length'?
   10 |   if(a[a.lenght()-1] == b[0] && b[b.length()-1] == c[0]){
      |          ^~~~~~
      |          length
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(){
	string A,B,C;
	cin >> A >> B >>C;
	if(A[A.size()-1] == B[0] && B[Bsize()-1] == C[0]){
		cout << "YES" << endl;
	}else{
		cout << "NO"<< endl;
	}
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:39: error: 'Bsize' was not declared in this scope; did you mean 'dysize'?
    6 |         if(A[A.size()-1] == B[0] && B[Bsize()-1] == C[0]){
      |                                       ^~~~~
      |                                       dysize
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(){
	string A,B,C;
	cin >> A >> B >>C;
	if(A[A.size()] == B[0] && B[Bsize()] == C[0]){
		cout << 'YES' << endl;
	}else{
		cout << 'NO' << endl;
	}
}

Compiler output:
a.cc:7:25: warning: multi-character character constant [-Wmultichar]
    7 |                 cout << 'YES' << endl;
      |                         ^~~~~
a.cc:9:25: warning: multi-character character constant [-Wmultichar]
    9 |                 cout << 'NO' << endl;
      |                         ^~~~
a.cc: In function 'int main()':
a.cc:6:37: error: 'Bsize' was not declared in this scope; did you mean 'dysize'?
    6 |         if(A[A.size()] == B[0] && B[Bsize()] == C[0]){
      |                                     ^~~~~
      |                                     dysize
Language: C

#include <stdio.h>
#include <iostream>
#include <string>
#include <stdlib.h>
using namespace std;
int main(void)
{
	char a[100];
	char b[100];
	char c[100];
	scanf("%s", &a);
	scanf("%s", &b);
	scanf("%s",&c);
	int d = strlen(a);
	int e = strlen(b);
	if (a[d-1]==b[0]&&b[e-1]==c[0])
	{
		printf("YES");
	}
	else
	{
		printf("NO");
	}
	return 0;
}

Compiler output:
main.c:2:10: fatal error: iostream: No such file or directory
    2 | #include <iostream>
      |          ^~~~~~~~~~
compilation terminated.
Language: C++

#include<iostream>
#include<string>
#include<vector>
#include<algorithm>
#include<cmath>
#include<map>
#include<iomanip>
#include<queue>
#include<stack>
#include<numeric>
#include<utility>

#pragma region _define

#define f(i,a,b) for(LL i=a;i<b;i++)
#define f_vI(v,n) f(i,0,n)cin>>v[i]
#define f_v2I(v1,v2,n) f(i,0,n)cin>>v1[i]>>v2[i]
#define f_vO(v,n) f(i,0,n)cout<<v[i]<<endl;
#define all(a) a.begin(),a.end()
#define size(s) s.size()
#define endl "\n"
#define y() cout<<"Yes"<<endl
#define Y() cout<<"YES"<<endl
#define n() cout<<"No"<<endl
#define N() cout<<"NO"<<endl

#pragma endregion

#pragma region _using

using namespace std;

using LL = long long;
using st = string;
using vi = vector<LL>;
using vvi = vector<vi>;
using vs = vector<st>;
using vb = vector<bool>;
using si = stack<LL>;
using ss = stack<st>;
using pi = pair<LL, LL>;
using v_pi = vector<pi>;

#pragma endregion

#pragma region _graph

#define node 50  //グラフの最大位数　適宜変更
//bool graph[node][node];
//bool visited[node] = { false };
#define link(a,b) f(i,0,n){cin>>a[i]>>b[i]; a[i]--; b[i]--; graph[a[i]][b[i]]=graph[b[i]][a[i]]=true;}

#pragma endregion

LL gcd(LL a, LL b) {
	LL r;
	while ((r = a % b) != 0) {
		a = b;
		b = r;
	}
	return b;
}
LL lcm(LL a, LL b) {
	return (a / gcd(a, b)*b);
}

/************************************************************************/
int main(void) {
	cin.tie(0); ios::sync_with_stdio(false);

	char a[20], b[20], c[20];
	cin >> a >> b >> c;
	if (a[strlen(a) - 1] == b[0] && b[strlen(b) - 1]==c[0]) {
		y();
	}
	else {
		n();
	}
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:73:15: error: 'strlen' was not declared in this scope
   73 |         if (a[strlen(a) - 1] == b[0] && b[strlen(b) - 1]==c[0]) {
      |               ^~~~~~
a.cc:12:1: note: 'strlen' is defined in header '<cstring>'; this is probably fixable by adding '#include <cstring>'
   11 | #include<utility>
  +++ |+#include <cstring>
   12 |
Language: C++

#include <stdio.h>
#include <iostream>
#include <string>
#include <stdlib.h>
using namespace std;
int main(void)
{
	char a[100];
	char b[100];
	char c[100];
	cin >> a >> b >> c;
	int d = strlen(a);
	int e = strlen(b);
	if (a[d-1]==b[0]&&b[e-1]==c[0])
	{
		cout << "YES";
	}
	else
	{
		cout << "NO";
	}
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:17: error: 'strlen' was not declared in this scope
   12 |         int d = strlen(a);
      |                 ^~~~~~
a.cc:5:1: note: 'strlen' is defined in header '<cstring>'; this is probably fixable by adding '#include <cstring>'
    4 | #include <stdlib.h>
  +++ |+#include <cstring>
    5 | using namespace std;
Language: C++

#include <stdio.h>
#include <iostream>
#include <string>
#include <stdlib.h>
using namespace std;
int main(void)
{
	char a[10];
	char b[10];
	char c[10];
	cin >> a >> b >> c;
	int d = strlen(a);
	int e = strlen(b);
	if (a[d-1]==b[0]&&b[e-1]==c[0])
	{
		cout << "YES";
	}
	else
	{
		cout << "NO";
	}
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:17: error: 'strlen' was not declared in this scope
   12 |         int d = strlen(a);
      |                 ^~~~~~
a.cc:5:1: note: 'strlen' is defined in header '<cstring>'; this is probably fixable by adding '#include <cstring>'
    4 | #include <stdlib.h>
  +++ |+#include <cstring>
    5 | using namespace std;
Language: C++

#include <stdio.h>
#include <iostream>
#include <string>
#include <stdlib.h>
int main(void)
{
	char a[10];
	char b[10];
	char c[10];
	std::cin >> a >> b >> c;
	int d = strlen(a);
	int e = strlen(b);
	if (a[d-1]==b[0]&&b[e-1]==c[0])
	{
		std::cout << "YES";
	}
	else
	{
		std::cout << "NO";
	}
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:17: error: 'strlen' was not declared in this scope
   11 |         int d = strlen(a);
      |                 ^~~~~~
a.cc:5:1: note: 'strlen' is defined in header '<cstring>'; this is probably fixable by adding '#include <cstring>'
    4 | #include <stdlib.h>
  +++ |+#include <cstring>
    5 | int main(void)
Language: C++

#include <stdio.h>
#include <iostream>
#include <string>
#include <stdlib.h>
int main(void)
{
	char a[10];
	char b[10];
	char c[10];
	int d=strlen(a);
	int e=strlen(b);
	std::cin >> a >> b >> c;
	if (a[d-1]==b[0]&&b[e-1]==c[0])
	{
		std::cout << "YES";
	}
	else
	{
		std::cout << "NO";
	}
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:15: error: 'strlen' was not declared in this scope
   10 |         int d=strlen(a);
      |               ^~~~~~
a.cc:5:1: note: 'strlen' is defined in header '<cstring>'; this is probably fixable by adding '#include <cstring>'
    4 | #include <stdlib.h>
  +++ |+#include <cstring>
    5 | int main(void)
Language: C++

#include <stdio.h>
#include <iostream>
#include <string>
#include <stdlib.h>
int main(void)
{
	char a[10];
	char b[10];
	char c[10];
	std::cin >> a >> b >> c;
	if (a[strlen(a)-1]==b[0]&&b[strlen(b)-1]==c[0])
	{
		std::cout << "YES";
	}
	else
	{
		std::cout << "NO";
	}
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:15: error: 'strlen' was not declared in this scope
   11 |         if (a[strlen(a)-1]==b[0]&&b[strlen(b)-1]==c[0])
      |               ^~~~~~
a.cc:5:1: note: 'strlen' is defined in header '<cstring>'; this is probably fixable by adding '#include <cstring>'
    4 | #include <stdlib.h>
  +++ |+#include <cstring>
    5 | int main(void)
Language: C++

#include <stdio.h>
#include <iostream>
#include <string>
int main(void)
{
	char a[10];
	char b[10];
	char c[10];
	std::cin >> a >> b >> c;
	if (a[strlen(a)-1]==b[0]&&b[strlen(b)-1]==c[0])
	{
		std::cout << "YES";
	}
	else
	{
		std::cout << "NO";
	}
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:15: error: 'strlen' was not declared in this scope
   10 |         if (a[strlen(a)-1]==b[0]&&b[strlen(b)-1]==c[0])
      |               ^~~~~~
a.cc:3:1: note: 'strlen' is defined in header '<cstring>'; this is probably fixable by adding '#include <cstring>'
    2 | #include <iostream>
  +++ |+#include <cstring>
    3 | #include <string>
Language: C++

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

int main(){
    string A,B,C;
    cin >> A >> B >> C;
    bool X=false
    if (A[A.size()-1]==B[0] && B[B.size()-1]==C[0]) X=true 
    if (X) cout << "YES" << endl;
    else cout << "NO" << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:5: error: expected ',' or ';' before 'if'
    9 |     if (A[A.size()-1]==B[0] && B[B.size()-1]==C[0]) X=true
      |     ^~
a.cc:11:5: error: 'else' without a previous 'if'
   11 |     else cout << "NO" << endl;
      |     ^~~~
Language: Java

import java.util.*;
 
class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String a = sc.nextLine();
        String b = sc.nextLine();
        String c = sc.nextLine();
      
		if(a.charAt(a.length()-1)==b.charAt(0)&&b.charAt(b.length()-1)==c.charAt(0)){
          System.out.print("YES");
        }else{
           System.out.print("NO");
        }
    }
    }
}

Compiler output:
Main.java:17: error: class, interface, enum, or record expected
}
^
1 error
Language: C++

#include<iostream>
#inclede<string>

using namespace std;

int main(){
 	
  string a,b,c;
  cin >>a >>b>>c;
  
	if(a[a.size()-1] == b[0] && b[b.size()-1]==c[0])cout <<"YES" <<endl;
	else cout <<"NO"<<endl;  
  
}

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

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

#define EPS (1e-7)
#define INF (1e9)
#define PI (acos(-1))
//const ll mod = 1000000007;

int main() {
    //cout.precision(10);
    string a, b, c;
    cin >> a >> b >> c;
  string ans = "YES";
    if((a.back() != b[0]) || (b.back() != c[0] )){
ans = "NO";
cout << ans << endl;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:19:2: error: expected '}' at end of input
   19 | }
      |  ^
a.cc:10:12: note: to match this '{'
   10 | int main() {
      |            ^
Language: C++

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

#define EPS (1e-7)
#define INF (1e9)
#define PI (acos(-1))
//const ll mod = 1000000007;

int main() {
    //cout.precision(10);
    string a, b, c;
    cin >> a >> b >> c;
  string ans = "YES"
    if((a.back() != b[0]) || (b.back() != c[0] )){
ans = "NO";
cout << ans << endl;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:15:5: error: expected ',' or ';' before 'if'
   15 |     if((a.back() != b[0]) || (b.back() != c[0] )){
      |     ^~
a.cc:19:2: error: expected '}' at end of input
   19 | }
      |  ^
a.cc:10:12: note: to match this '{'
   10 | int main() {
      |            ^
Language: C++

#include<iostream>
#include<algorithm>

using namespace std;

int main() {
	char a[10], b[10], c[10];
	cin >> a;
	cin >> b;
	cin >> c;
	int ta = strlen(a);
	int tb = strlen(b);
	int tc = strlen(c);
	if (a[ta - 1] == b[0] && b[tb - 1] == c[0]) {
		cout << "Yes" << endl;
	}
	else {
		cout << "No" << endl;
	}
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:18: error: 'strlen' was not declared in this scope
   11 |         int ta = strlen(a);
      |                  ^~~~~~
a.cc:3:1: note: 'strlen' is defined in header '<cstring>'; this is probably fixable by adding '#include <cstring>'
    2 | #include<algorithm>
  +++ |+#include <cstring>
    3 |
Language: Java

import java.util.*;
// cin=sc.nextInt();
// List<Integer> a = new ArrayList<Integer>(n);
 
public class Main {
    public static void main(String args[]){
		    Scanner sc = new Scanner(System.in);	
			String a = sc.next();
			String b = sc.next();
			String c = sc.next();
			int d = a.length();
			int e = b.length();
			if(a[d-1] == b[0] && b[e-1] == c[0]){
				System.out.println("Yes");
			}
			else{
				System.out.println("No");
			}
	}
}

Compiler output:
Main.java:13: error: array required, but String found
			if(a[d-1] == b[0] && b[e-1] == c[0]){
			    ^
Main.java:13: error: array required, but String found
			if(a[d-1] == b[0] && b[e-1] == c[0]){
			              ^
Main.java:13: error: array required, but String found
			if(a[d-1] == b[0] && b[e-1] == c[0]){
			                      ^
Main.java:13: error: array required, but String found
			if(a[d-1] == b[0] && b[e-1] == c[0]){
			                                ^
4 errors
Language: C

#include <stdio.h>
#include <string.h>
int main(void){
  char a[11],b[11],c[11];
  scanf("%s %s %s",a,b,c);
  if(a[strlen(a)-1]==b[0]&&b[strlen(b)-1]==c[0]){
    prentf("YES");
  }else printf("NO");
   return 0;
}
  

Compiler output:
main.c: In function 'main':
main.c:7:5: error: implicit declaration of function 'prentf'; did you mean 'printf'? [-Wimplicit-function-declaration]
    7 |     prentf("YES");
      |     ^~~~~~
      |     printf
Language: C

#include <stdio.h>
#include <string.h>
int main(void){
  char a[11],b[11],c[11];
  scanf("%s %s %s",a,b,c);
  if(a[strlen(a)-1==b(0)&&b[strlen(b)-1==c(0)){
    prentf("YES");
  }else printf("NO");
   return 0;
}
  

Compiler output:
main.c: In function 'main':
main.c:6:21: error: called object 'b' is not a function or function pointer
    6 |   if(a[strlen(a)-1==b(0)&&b[strlen(b)-1==c(0)){
      |                     ^
main.c:4:14: note: declared here
    4 |   char a[11],b[11],c[11];
      |              ^
main.c:6:42: error: called object 'c' is not a function or function pointer
    6 |   if(a[strlen(a)-1==b(0)&&b[strlen(b)-1==c(0)){
      |                                          ^
main.c:4:20: note: declared here
    4 |   char a[11],b[11],c[11];
      |                    ^
main.c:6:46: error: expected ']' before ')' token
    6 |   if(a[strlen(a)-1==b(0)&&b[strlen(b)-1==c(0)){
      |                                              ^
      |                                              ]
main.c:6:46: error: expected ']' before ')' token
    6 |   if(a[strlen(a)-1==b(0)&&b[strlen(b)-1==c(0)){
      |                                              ^
      |                                              ]
main.c:7:5: error: implicit declaration of function 'prentf'; did you mean 'printf'? [-Wimplicit-function-declaration]
    7 |     prentf("YES");
      |     ^~~~~~
      |     printf
Language: C

#include <stdio.h>
#include <string.h>
int main(void){
  char a[11],b[11],c[11];
  scanf("%s %s %s",a,b,c);
  if(a[strlen(a)-1==b(0)&&b[strlen(b)-1==b(0)){
    prentf("YES");
  }else printf("NO");
   return 0;
}
  

Compiler output:
main.c: In function 'main':
main.c:6:21: error: called object 'b' is not a function or function pointer
    6 |   if(a[strlen(a)-1==b(0)&&b[strlen(b)-1==b(0)){
      |                     ^
main.c:4:14: note: declared here
    4 |   char a[11],b[11],c[11];
      |              ^
main.c:6:42: error: called object 'b' is not a function or function pointer
    6 |   if(a[strlen(a)-1==b(0)&&b[strlen(b)-1==b(0)){
      |                                          ^
main.c:4:14: note: declared here
    4 |   char a[11],b[11],c[11];
      |              ^
main.c:6:46: error: expected ']' before ')' token
    6 |   if(a[strlen(a)-1==b(0)&&b[strlen(b)-1==b(0)){
      |                                              ^
      |                                              ]
main.c:6:46: error: expected ']' before ')' token
    6 |   if(a[strlen(a)-1==b(0)&&b[strlen(b)-1==b(0)){
      |                                              ^
      |                                              ]
main.c:7:5: error: implicit declaration of function 'prentf'; did you mean 'printf'? [-Wimplicit-function-declaration]
    7 |     prentf("YES");
      |     ^~~~~~
      |     printf
Language: C++

#include<stdio.h>
int main(void){
  int A,B,C;
  int i;
  scanf("%d %d %d",&A,&B,&C);
  for(i=1;i<=100;i++){
    if(A*i%B==C){
      printf("Yes/n");
      break;
    }
    else{
      printf("No/n");
    }
    return 0;
  }

Compiler output:
a.cc: In function 'int main()':
a.cc:15:4: error: expected '}' at end of input
   15 |   }
      |    ^
a.cc:2:15: note: to match this '{'
    2 | int main(void){
      |               ^
Language: C++

#include<iostream>

using namespace std;

int main(){
int A,B,C,i=1,x;
  cin >> A >> B >> C >> i >> x;
  
  while(true);
    x = A*i;
  
  if(A + x % B == C){
  cout << "YES" << endl;
  }
  else{
  cout << "NO" << endl;
  }
  }
}


Compiler output:
a.cc:19:1: error: expected declaration before '}' token
   19 | }
      | ^
Language: C++

#include<iostream>

using namespace std;

int main(){
int A,B,C,i=1,x;
  cin >> A >> B >> C >> i >> x;
  
  while(true)
    x = A*i
  
  if(A + x % B == C){
  cout << "YES" << endl;
  }
  else{
  cout << "NO" << endl;
  }
  }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:12: error: expected ';' before 'if'
   10 |     x = A*i
      |            ^
      |            ;
   11 | 
   12 |   if(A + x % B == C){
      |   ~~        
a.cc:15:3: error: 'else' without a previous 'if'
   15 |   else{
      |   ^~~~
a.cc: At global scope:
a.cc:19:1: error: expected declaration before '}' token
   19 | }
      | ^
Language: C++

const std::vector<int> x = {1,2};
int n = x.size();

Compiler output:
a.cc:1:12: error: 'vector' in namespace 'std' does not name a template type
    1 | const std::vector<int> x = {1,2};
      |            ^~~~~~
a.cc:1:1: note: 'std::vector' is defined in header '<vector>'; this is probably fixable by adding '#include <vector>'
  +++ |+#include <vector>
    1 | const std::vector<int> x = {1,2};
a.cc:2:9: error: 'x' was not declared in this scope
    2 | int n = x.size();
      |         ^
Language: C++

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

int main(){
  string a,b,c;
  cin>>a>>b>>c;
  (a[array_size-1]==b[0]&&b[array_size-1]-1]==c[0])"YES":"NO";
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:6: error: 'array_size' was not declared in this scope
    8 |   (a[array_size-1]==b[0]&&b[array_size-1]-1]==c[0])"YES":"NO";
      |      ^~~~~~~~~~
a.cc:8:44: error: expected ')' before ']' token
    8 |   (a[array_size-1]==b[0]&&b[array_size-1]-1]==c[0])"YES":"NO";
      |   ~                                        ^
      |                                            )
Language: C

#include<stdio.h>

int len(*s){
  int len;
  
  while(s){
    len++;
  }
  
  return len;
}
 
int main(){
  char a[11], b[11], c[11];
  int alen, blen, clen;
  scanf("%s %s %s", a, b, c);
  
  alen = len(a);
  blen = len(b);
  clen = len(c);
  
  if(a[alen - 1] == b[0] && b[blen - 1] == c[0]){
    printf("YES\n");
  } else {
    printf("NO\n");
  }
  
  return 0;
}

Compiler output:
main.c:3:9: error: expected declaration specifiers or '...' before '*' token
    3 | int len(*s){
      |         ^
main.c: In function 'main':
main.c:18:10: error: implicit declaration of function 'len' [-Wimplicit-function-declaration]
   18 |   alen = len(a);
      |          ^~~
Language: C

#include<stdio.h>

int len(*s){
  int len;
  
  while(s){
    len++;
  }
  
  return len;
}
 
int main(){
  int a[11], b[11], c[11], alen, blen, clen;
  scanf("%s %s %s", a, b, c);
  
  alen = len(a);
  blen = len(b);
  clen = len(c);
  
  if(a[alen - 1] == b[0] && b[blen - 1] == c[0]){
    printf("YES\n");
  } else {
    printf("NO\n");
  }
  
  return 0;
}

Compiler output:
main.c:3:9: error: expected declaration specifiers or '...' before '*' token
    3 | int len(*s){
      |         ^
main.c: In function 'main':
main.c:17:10: error: implicit declaration of function 'len' [-Wimplicit-function-declaration]
   17 |   alen = len(a);
      |          ^~~
Language: C

#include<stdio.h>

int len(*s){
  int len;
  
  while(s){
    len++;
  }
  
  return len;
}
 
int main(){
  int a[11], b[11], c[11], alen, blen, clen;
  scanf("%s %s %s", &a, &b, &c);
  
  alen = len(a);
  blen = len(b);
  clen = len(c);
  
  if(a[alen - 1] == b[0] && b[blen - 1] == c[0]){
    printf("YES\n");
  } else {
    printf("NO\n");
  }
  
  return 0;
}

Compiler output:
main.c:3:9: error: expected declaration specifiers or '...' before '*' token
    3 | int len(*s){
      |         ^
main.c: In function 'main':
main.c:17:10: error: implicit declaration of function 'len' [-Wimplicit-function-declaration]
   17 |   alen = len(a);
      |          ^~~
Language: C

#include<stdio.h>

int len(*s){
  int len;
  
  while(s){
    len++;
  }
  
  return len;
}
 
int main(){
  int a[11], b[11], c[11], alen, blen, clen;
  scanf("%d %d %d", &a, &b, &c);
  
  alen = len(a);
  blen = len(b);
  clen = len(c);
  
  if(a[alen - 1] == b[0] && b[blen - 1] == c[0]){
    printf("YES\n");
  } else {
    printf("NO\n");
  }
  
  return 0;
}

Compiler output:
main.c:3:9: error: expected declaration specifiers or '...' before '*' token
    3 | int len(*s){
      |         ^
main.c: In function 'main':
main.c:17:10: error: implicit declaration of function 'len' [-Wimplicit-function-declaration]
   17 |   alen = len(a);
      |          ^~~
Language: C++

#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
using namespace std;
static const int MAX = 200000;

int main()
{
	string s0, s1, s2;
	cin >> s0 >> s1 >> s2;

	if (s0.back() == s1[0] && s1.back == s2[0]) {
		cout << "YES" << endl;
	}
	else {
		cout << "NO" << endl;
	}

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:43: error: invalid operands of types '<unresolved overloaded function type>' and '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'} to binary 'operator=='
   13 |         if (s0.back() == s1[0] && s1.back == s2[0]) {
Language: C++

#include<bits/stadc++.h>
using namespace std;
int main() {
	string s1, s2, s3;
	cin >> s1 >> s2 >> s3;
	if (s1[s1.size() - 1] == s2[0] && s2[s2.size() - 1] == s3[0]) {
		cout << "YES" << endl;
	}
	else {
		cout << "NO" << endl;
	}
	return 0;
}

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

#include<bits/stdc++.h>
#define MAX_N 100001
#define INF_INT 2147483647
#define INF_LL 9223372036854775807
#define REP(i,n) for(int i=0;i<(int)(n);i++)
using namespace std;
typedef long long int ll;
typedef pair<ll,ll> P;
const int MOD = 1000000007;

int main()
{
  string A,B,C;
  cin >> A >> B >> C;
  cout << (A[A.size()-1] == B[0] && B[B.size()-1] == C[0]) ? "YES" : "NO" << endl; 
  return 0;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:15:75: error: invalid operands of types 'const char [3]' and '<unresolved overloaded function type>' to binary 'operator<<'
   15 |   cout << (A[A.size()-1] == B[0] && B[B.size()-1] == C[0]) ? "YES" : "NO" << endl;
      |                                                                      ~~~~~^~~~~~~
Language: C


#include <stdio.h>

int main()
{
   long int n,k,max=0,count=0,i,j,min=9999;
   char a[100000],b[100000],c[100000];
   gets(a);
   gets(b);
   gets(c);
   if(a[strlen(a)-1]==b[0]  b[strlen(b)-1]==c[0])
   {
       printf("YES");
   }else{
       printf("NO");
   }
    return 0;
}

Compiler output:
main.c: In function 'main':
main.c:8:4: error: implicit declaration of function 'gets'; did you mean 'fgets'? [-Wimplicit-function-declaration]
    8 |    gets(a);
      |    ^~~~
      |    fgets
main.c:11:9: error: implicit declaration of function 'strlen' [-Wimplicit-function-declaration]
   11 |    if(a[strlen(a)-1]==b[0]  b[strlen(b)-1]==c[0])
      |         ^~~~~~
main.c:3:1: note: include '<string.h>' or provide a declaration of 'strlen'
    2 | #include <stdio.h>
  +++ |+#include <string.h>
    3 | 
main.c:11:9: warning: incompatible implicit declaration of built-in function 'strlen' [-Wbuiltin-declaration-mismatch]
   11 |    if(a[strlen(a)-1]==b[0]  b[strlen(b)-1]==c[0])
      |         ^~~~~~
main.c:11:9: note: include '<string.h>' or provide a declaration of 'strlen'
main.c:11:27: error: expected ')' before 'b'
   11 |    if(a[strlen(a)-1]==b[0]  b[strlen(b)-1]==c[0])
      |      ~                    ^ ~
      |                           )
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(){
  string a,b,c;
  cin >> a >> b >> c;
  if(a.at(a,size()-1) == b.at(0) && b.at(b.size()-1) == c.at(0)){
    cout << "YES" << endl;
  }else{
    cout << "NO" << endl;
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:17: error: no matching function for call to 'size()'
    6 |   if(a.at(a,size()-1) == b.at(0) && b.at(b.size()-1) == c.at(0)){
      |             ~~~~^~
In file included from /usr/include/c++/14/string:53,
                 from /usr/include/c++/14/bitset:52,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:52,
                 from a.cc:1:
/usr/include/c++/14/bits/range_access.h:262:5: note: candidate: 'template<class _Container> constexpr decltype (__cont.size()) std::size(const _Container&)'
  262 |     size(const _Container& __cont) noexcept(noexcept(__cont.size()))
      |     ^~~~
/usr/include/c++/14/bits/range_access.h:262:5: note:   candidate expects 1 argument, 0 provided
/usr/include/c++/14/bits/range_access.h:272:5: note: candidate: 'template<class _Tp, long unsigned int _Nm> constexpr std::size_t std::size(const _Tp (&)[_Nm])'
  272 |     size(const _Tp (&)[_Nm]) noexcept
      |     ^~~~
/usr/include/c++/14/bits/range_access.h:272:5: note:   candidate expects 1 argument, 0 provided
Language: C++

/*input
async layered coding
*/
#include <bits/stdc++.h>
#pragma GCC optimize("unroll-loops,no-stack-protector")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
typedef pair<double,double> pdd;
#define IOS ios_base::sync_with_stdio(0); cin.tie(0)
#define ALL(a) a.begin(),a.end()
#define SZ(a) ((int)a.size())
#define F first
#define S second
#define REP(i,n) for(int i=0;i<((int)n);i++)
#define pb push_back
#define MP(a,b) make_pair(a,b)
#define SORT_UNIQUE(c) (sort(c.begin(),c.end()), c.resize(distance(c.begin(),unique(c.begin(),c.end()))))
#define GET_POS(c,x) (lower_bound(c.begin(),c.end(),x)-c.begin())
#ifdef leowang
#define debug(...) do{\
	fprintf(stderr,"%s - %d : (%s) = ",__PRETTY_FUNCTION__,__LINE__,#__VA_ARGS__);\
	_DO(__VA_ARGS__);\
}while(0)
template<typename I> void _DO(I&&x){cerr<<x<<endl;}
template<typename I,typename...T> void _DO(I&&x,T&&...tail){cerr<<x<<", ";_DO(tail...);}
#else
#define debug(...)
#endif
template<typename T1,typename T2>
ostream& operator<<(ostream& out,pair<T1,T2> P){
	out<<'('<<P.F<<','<<P.S<<')';
	return out;
}
//}}}
const ll maxn=300005;
const ll maxlg=__lg(maxn)+2;
const ll INF64=8000000000000000000LL;
const int INF=0x3f3f3f3f;
const ll MOD=ll(1e9+7);
const double PI=acos(-1);
//const ll p=880301;
//const ll P=31;

ll mypow(ll a,ll b){
	ll res=1LL;
	while(b){
		if(b&1) res=res*a%MOD;
		a=a*a%MOD;
		
		b>>=1;
	}
	return res;
}
int main()
{
	IOS;
	string a,b,c;
	cin>>a>>b>>C;
	if(a.back()==b[0]&&b.back()==c[0]){
		cout<<"YES\n";
	}
	else cout<<"NO"
	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:61:20: error: 'C' was not declared in this scope
   61 |         cin>>a>>b>>C;
      |                    ^
a.cc:65:24: error: expected ';' before 'return'
   65 |         else cout<<"NO"
      |                        ^
      |                        ;
   66 |         return 0;
      |         ~~~~~~
Language: C

#include<bits/stdc++.h>
using namespace std;
string a,b,c;
int main()
{
    cin>>a>>b>>c;
    if(a[a.size()-1]==b[0]&&b[b.size()-1]==c[0])
        cout<<"YES"<<endl;
    else
        cout<<"NO"<<endl;
    return 0;
}


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

#include <stdio.h>
#include <string.h>

int main(){
	char a[11], b[11], c[11];
	scanf("%s",a);
	scanf("%s",b);
	scanf("%s",c);
	int la, lb, lc;
	la=strlen(a);
	lb=strlen(b);
	//lc=strlen(c);
	if(a[la-1]==b[0] && b[lb-1]==c[0])
	printf("YES\n")
	else
	printf("NO\n");
}
	


Compiler output:
a.cc: In function 'int main()':
a.cc:14:24: error: expected ';' before 'else'
   14 |         printf("YES\n")
      |                        ^
      |                        ;
   15 |         else
      |         ~~~~
Language: C++

#include<stdio.h>
int main()
{
    char ar[100],br[100],cr[100];
    scanf ("%s %s %s",ar,br,cr);
    int p,q,r;
    p=strlen(ar);
    q=strlen(br);
    r=strlen(cr);

    if (ar[p-1]==br[0] && br[q-1]==cr[0])
    {
        printf ("YES\n");
    }
    else if (ar[p-1]!=br[0] || br[q-1]!=cr[0])
    {
        printf ("NO\n");
    }
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:7: error: 'strlen' was not declared in this scope
    7 |     p=strlen(ar);
      |       ^~~~~~
a.cc:2:1: note: 'strlen' is defined in header '<cstring>'; this is probably fixable by adding '#include <cstring>'
    1 | #include<stdio.h>
  +++ |+#include <cstring>
    2 | int main()
Language: C++

#include<stdio.h>
#include<string.h>
int main(){
    char ara[10000];
    gets(ara);
    int f=0;
    int n=strlen(ara);
    for(int i=0;i<n;i++){
        if(ara[i]==' '){
            if(ara[i-1]!=ara[i+1]){
                f=1;
                break;
            }
           
        }
    }
    if(f==0) printf("YES\n");
    else printf("NO\n");
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:5: error: 'gets' was not declared in this scope; did you mean 'getw'?
    5 |     gets(ara);
      |     ^~~~
      |     getw
Language: C++

#include<iostream>
#include<cmath>
#include<algorithm>
#include <cassert>
#include<string>
using namespace std;
int main(){
	int a = 0, b = 0, c=0, d[100000], e[100000],f=0,g=0,h=0, count = 0;
	char rikka,toka[100000];
	string mado[100000],saya;
	cin >> mado[0]>>mado[1]>>mado[2];
	if (mado[0].back()==mado[1].front()&&mado[1].back()==mado[2].front) {
		cout << "YES" << endl;
	}
	else { cout << "NO" << endl; }
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:60: error: invalid operands of types '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'} and '<unresolved overloaded function type>' to binary 'operator=='
   12 |         if (mado[0].back()==mado[1].front()&&mado[1].back()==mado[2].front) {
      |                                              ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~
      |                                                          |           |
      |                                                          |           <unresolved overloaded function type>
      |                                                          __gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type {aka char}
Language: C++

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

int main() {
  string A, B, C;
  int H, W;

  cin >> A >> B >> C;
  if (A[A.length() - 1] == B[B.length() - 1] && B[B.length() - 1] == C[C.length() - 1)
    cout << "YES" << endl;
  else
    cout << "NO" << endl;

  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:86: error: expected ']' before ')' token
   10 |   if (A[A.length() - 1] == B[B.length() - 1] && B[B.length() - 1] == C[C.length() - 1)
      |                                                                                      ^
      |                                                                                      ]
Language: C

#include<bits/stdc++.h>
using namespace std;
string a,b,c;
int main(){
	cin>>a>>b>>c;
	if(a[a.length()-1]==b[0]&&b[b.length()-1]==c[0]) puts("YES");
	else puts("NO");
	return 0;
}

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