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 () {
    cout << "NO" << endl;
  }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:6:15: error: 'B' was not declared in this scope
    6 |   cin >> A >> B >> C;
      |               ^
a.cc:10:9: error: expected primary-expression before ')' token
   10 |   else () {
      |         ^
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 () {
    cout << "NO" << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:6:15: error: 'B' was not declared in this scope
    6 |   cin >> A >> B >> C;
      |               ^
a.cc:10:9: error: expected primary-expression before ')' token
   10 |   else () {
      |         ^
a.cc:12:2: error: expected '}' at end of input
   12 | }
      |  ^
a.cc:4:11: note: to match this '{'
    4 | int main(){
      |           ^
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] == C0]) {
    cout << "YES" << endl;
  }
  else () {
    cout << "NO" << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:6:15: error: 'B' was not declared in this scope
    6 |   cin >> A >> B >> C;
      |               ^
a.cc:7:48: error: 'C0' was not declared in this scope; did you mean 'C'?
    7 |   if (A[A.size()-1] = B[0] && B[B.size()-1] == C0]) {
      |                                                ^~
      |                                                C
a.cc:7:50: error: expected ')' before ']' token
    7 |   if (A[A.size()-1] = B[0] && B[B.size()-1] == C0]) {
      |      ~                                           ^
      |                                                  )
a.cc:7:50: error: expected primary-expression before ']' token
a.cc:10:9: error: expected primary-expression before ')' token
   10 |   else () {
      |         ^
a.cc:12:2: error: expected '}' at end of input
   12 | }
      |  ^
a.cc:4:11: note: to match this '{'
    4 | int main(){
      |           ^
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()] == C0]) {
    cout << "YES" << endl;
  }
  else () {
    cout << "NO" << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:6:15: error: 'B' was not declared in this scope
    6 |   cin >> A >> B >> C;
      |               ^
a.cc:7:44: error: 'C0' was not declared in this scope; did you mean 'C'?
    7 |   if (A[A.size()] = B[0] && B[B.size()] == C0]) {
      |                                            ^~
      |                                            C
a.cc:7:46: error: expected ')' before ']' token
    7 |   if (A[A.size()] = B[0] && B[B.size()] == C0]) {
      |      ~                                       ^
      |                                              )
a.cc:7:46: error: expected primary-expression before ']' token
a.cc:10:9: error: expected primary-expression before ')' token
   10 |   else () {
      |         ^
a.cc:12:2: error: expected '}' at end of input
   12 | }
      |  ^
a.cc:4:11: note: to match this '{'
    4 | int main(){
      |           ^
Language: C++

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

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


Compiler output:
a.cc: In function 'int main()':
a.cc:6:15: error: 'B' was not declared in this scope
    6 |   cin >> A >> B >> C;
      |               ^
a.cc:10:9: error: expected primary-expression before ')' token
   10 |   else () {
      |         ^
a.cc:12:2: error: expected '}' at end of input
   12 | }
      |  ^
a.cc:4:11: note: to match this '{'
    4 | int main(){
      |           ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define rep(i,N) for(int i=0,i##_max=(N);i<i##_max;++i)
#define repp(i,l,r) for(int i=(l),i##_max=(r);i<i##_max;++i)
#define per(i,N) for(int i=(N)-1;i>=0;--i)
#define perr(i,l,r) for(int i=r-1,i##_min(l);i>=i##_min;--i)
#define all(arr) (arr).begin(), (arr).end()
#define SP << " " <<
#define SPF << " "
#define SPEEDUP cin.tie(0);ios::sync_with_stdio(false);
#define MAX_I INT_MAX //1e9
#define MIN_I INT_MIN //-1e9
#define MAX_UI UINT_MAX //1e9
#define MAX_LL LLONG_MAX //1e18
#define MIN_LL LLONG_MIN //-1e18
#define MAX_ULL ULLONG_MAX //1e19
  typedef long long ll;
  typedef pair<int,int> PII;
  typedef pair<char,char> PCC;
  typedef pair<ll,ll> PLL;
  typedef pair<char,int> PCI;
  typedef pair<int,char> PIC;
  typedef pair<ll,int> PLI;
  typedef pair<int,ll> PIL; 
  typedef pair<ll,char> PLC; 
  typedef pair<char,ll> PCL; 

inline void YesNo(bool b){ cout << (b?"Yes" : "No") << endl;}
inline void YESNO(bool b){ cout << (b?"YES" : "NO") << endl;}
inline void Yay(bool b){ cout << (b?"Yay!" : ":(") << endl;}

int main(void){
  SPEEDUP
  cout << setprecision(15);
  int a,b,c;cin >> a >> b >> c;
  bool issat = false;
  if(a[a.length()-1] == b[0] && b[b.length()-1] == c[0])issat = true;
  YESNO(issat);
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:37:10: error: request for member 'length' in 'a', which is of non-class type 'int'
   37 |   if(a[a.length()-1] == b[0] && b[b.length()-1] == c[0])issat = true;
      |          ^~~~~~
a.cc:37:26: error: invalid types 'int[int]' for array subscript
   37 |   if(a[a.length()-1] == b[0] && b[b.length()-1] == c[0])issat = true;
      |                          ^
a.cc:37:37: error: request for member 'length' in 'b', which is of non-class type 'int'
   37 |   if(a[a.length()-1] == b[0] && b[b.length()-1] == c[0])issat = true;
      |                                     ^~~~~~
a.cc:37:53: error: invalid types 'int[int]' for array subscript
   37 |   if(a[a.length()-1] == b[0] && b[b.length()-1] == c[0])issat = true;
      |                                                     ^
Language: C++

#include <iostream>
#include <vector>
#include <algorithm>
#include <set>
#include <map>
#include <utility>
#include <tuple>
#include <string>
#include <cctype>
#include <cstdio>
using namespace std;
#define rep(i, n) for(int i = 0; i < (int)(n); i++)
#define SORT(x) sort(x.begin(),x.end())
#define REVE(x) reverse(x.begin(),x.end())
#define all(x) (x).begin(),(x).end()
#define fst first
#define mp make_pair
#define pb push_back
#define eb emplace_back
#define pob pop_back
#define sw swap
#define UP(x) transform(x.begin(),x.end(),x.begin() ,::toupper);
#define down(x) transform(x.begin(),x.end(),x.begin() ,::tolower);
using LL = long long;
using ULL = unsigned long long;
#define FOR(i, m, n) for(int i = m;i < n;i++)
template<class T> inline bool chmax(T& a,T b){if(a<b){a=b;return 1;}return 0;}
template<class T> inline bool chmin(T& a,T b){if(a>b){a=b;return 1;}return 0;}
int main(){
    string n,a,b,c;
    cin >> a >>b >> c;
    if(a.size()-1==b[0]&&b.size()-1==c.[0]){
      cout <<"YES";
    }else{
        cout <<"NO";
    }
 
}

Compiler output:
a.cc: In function 'int main()':
a.cc:32:40: error: expected unqualified-id before '[' token
   32 |     if(a.size()-1==b[0]&&b.size()-1==c.[0]){
      |                                        ^
Language: C++

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

int main() {
    string a, b, c;
    cin >> a >> b >> c;
    if (*a.rbegin() == b.at(0) && *b.rbegin == c.at(0)) cout << "YES" << endl;
    else cout << "NO" << endl;
}   

Compiler output:
a.cc: In function 'int main()':
a.cc:7:38: error: invalid use of member function 'std::__cxx11::basic_string<char>::rbegin' (did you forget the '()' ?)
    7 |     if (*a.rbegin() == b.at(0) && *b.rbegin == c.at(0)) cout << "YES" << endl;
      |                                    ~~^~~~~~
Language: C++

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


Compiler output:
a.cc: In function 'int main()':
a.cc:7:11: error: expected primary-expression before '|' token
    7 |   int x = |s1|-1;
      |           ^
a.cc:8:11: error: expected primary-expression before '|' token
    8 |   int y = |s2|-1;
      |           ^
a.cc:9:11: error: expected primary-expression before '|' token
    9 |   int z = |s3|-1;
      |           ^
Language: C++

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

signed main(){
	int a,b,c;cin>>a>>b>>c;
  if(a.back()==b.front()&&b.back()==c.front())cout<<"YES"<<endl;
  else cout<<"NO"<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:8: error: request for member 'back' in 'a', which is of non-class type 'int'
    6 |   if(a.back()==b.front()&&b.back()==c.front())cout<<"YES"<<endl;
      |        ^~~~
a.cc:6:18: error: request for member 'front' in 'b', which is of non-class type 'int'
    6 |   if(a.back()==b.front()&&b.back()==c.front())cout<<"YES"<<endl;
      |                  ^~~~~
a.cc:6:29: error: request for member 'back' in 'b', which is of non-class type 'int'
    6 |   if(a.back()==b.front()&&b.back()==c.front())cout<<"YES"<<endl;
      |                             ^~~~
a.cc:6:39: error: request for member 'front' in 'c', which is of non-class type 'int'
    6 |   if(a.back()==b.front()&&b.back()==c.front())cout<<"YES"<<endl;
      |                                       ^~~~~
Language: Java

import java.util.Scanner;
public class Main2 {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        String A = scan.next();
        String B = scan.next();
        String C = scan.next();
        if(A.charAt(A.length()-1) == B.charAt(0) && B.charAt(B.length()-1)==C.charAt(0)){
            System.out.println("YES");
        }else{
            System.out.println("NO");
        }
    }
}

Compiler output:
Main.java:2: error: class Main2 is public, should be declared in a file named Main2.java
public class Main2 {
       ^
1 error
Language: Java

import java.util.Scanner;
public class Main2 {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        String A = scan.next();
        String B = scan.next();
        String C = scan.next();
        if(A.charAt(A.length()-1) == B.charAt(0) && B.charAt(B.length()-1)==C.charAt(0)){
            System.out.println("YES");
        }else{
            System.out.println("NO");
        }
    

Compiler output:
Main.java:12: error: reached end of file while parsing
        }
         ^
1 error
Language: Java

import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        String A = scan.next();
        String B = scan.next();
        String C = scan.next();
        if(A.charAt(A.length()-1) == B.charAt(0) && B.charAt(B.length()-1)==C.charAt(0)){
            System.out.println("YES");
        }else{
            System.out.println("NO");
        }
    }

Compiler output:
Main.java:13: error: reached end of file while parsing
    }
     ^
1 error
Language: Java

import java.util.Scanner;
public class Main2 {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        String A = scan.next();
        String B = scan.next();
        String C = scan.next();
        if(A.charAt(A.length()-1) == B.charAt(0) && B.charAt(B.length()-1)==C.charAt(0)){
            System.out.println("YES");
        }else{
            System.out.println("NO");
        }
    }

Compiler output:
Main.java:13: error: reached end of file while parsing
    }
     ^
1 error
Language: C++

include<bits/std.c++>
  using namespace std;
int main(){
  string a,b,c;cin>>a>>b>>c;
  //bool A=a.at(a.size())==b.at(0);
 // bool B=b.at(b.size())==c.at(0);
  if(A=a.at(a.size())==b.at(0)&&B=b.at(b.size())==c.at(0))
    cout<<"YES";
  else
    cout<<"NO";
}
    
  

Compiler output:
a.cc:1:1: error: 'include' does not name a type
    1 | include<bits/std.c++>
      | ^~~~~~~
a.cc: In function 'int main()':
a.cc:4:3: error: 'string' was not declared in this scope
    4 |   string a,b,c;cin>>a>>b>>c;
      |   ^~~~~~
a.cc:4:16: error: 'cin' was not declared in this scope
    4 |   string a,b,c;cin>>a>>b>>c;
      |                ^~~
a.cc:4:21: error: 'a' was not declared in this scope
    4 |   string a,b,c;cin>>a>>b>>c;
      |                     ^
a.cc:4:24: error: 'b' was not declared in this scope
    4 |   string a,b,c;cin>>a>>b>>c;
      |                        ^
a.cc:4:27: error: 'c' was not declared in this scope
    4 |   string a,b,c;cin>>a>>b>>c;
      |                           ^
a.cc:7:6: error: 'A' was not declared in this scope
    7 |   if(A=a.at(a.size())==b.at(0)&&B=b.at(b.size())==c.at(0))
      |      ^
a.cc:7:33: error: 'B' was not declared in this scope
    7 |   if(A=a.at(a.size())==b.at(0)&&B=b.at(b.size())==c.at(0))
      |                                 ^
a.cc:8:5: error: 'cout' was not declared in this scope
    8 |     cout<<"YES";
      |     ^~~~
a.cc:10:5: error: 'cout' was not declared in this scope
   10 |     cout<<"NO";
      |     ^~~~
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";
    }
    else {
        cout << "NO";
    }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:12: error: invalid use of 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]' (did you forget the '()' ?)
    7 |     if(a[a.size-1]==b[0] && b[b.size-1]==c[0]) {
      |          ~~^~~~
      |                ()
a.cc:7:33: error: invalid use of 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]' (did you forget the '()' ?)
    7 |     if(a[a.size-1]==b[0] && b[b.size-1]==c[0]) {
      |                               ~~^~~~
      |                                     ()
Language: C++

read a b c;
[ ${a: -1} = ${b:0:1} -a ${b: -1} = ${c:0:1} ] && echo "YES" || echo "NO"

Compiler output:
a.cc:1:1: error: 'read' does not name a type
    1 | read a b c;
      | ^~~~
a.cc:2:1: error: expected unqualified-id before '[' token
    2 | [ ${a: -1} = ${b:0:1} -a ${b: -1} = ${c:0:1} ] && echo "YES" || echo "NO"
      | ^
a.cc:2:12: error: expected unqualified-id before '=' token
    2 | [ ${a: -1} = ${b:0:1} -a ${b: -1} = ${c:0:1} ] && echo "YES" || echo "NO"
      |            ^
a.cc:2:23: error: expected unqualified-id before '-' token
    2 | [ ${a: -1} = ${b:0:1} -a ${b: -1} = ${c:0:1} ] && echo "YES" || echo "NO"
      |                       ^
a.cc:2:35: error: expected unqualified-id before '=' token
    2 | [ ${a: -1} = ${b:0:1} -a ${b: -1} = ${c:0:1} ] && echo "YES" || echo "NO"
      |                                   ^
a.cc:2:46: error: expected unqualified-id before ']' token
    2 | [ ${a: -1} = ${b:0:1} -a ${b: -1} = ${c:0:1} ] && echo "YES" || echo "NO"
      |                                              ^
Language: C

#include <stdio.h>
int main(){
  int x,y;
  char a[20],b[20],c[20];
  scanf("%s %s %s",a,b,c);
  int c=0;
  while(1){
    if(a[c]=='\0')break;
    c++;
  }
  x=c;
  c=0;
  while(1){
    if(b[c]=='\0')break;
    c++;
  }
  y=c;
  if(a[x-1]==b[0] && b[y-1]==c[0])puts("YES");
  else puts("NO");
  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:6:7: error: conflicting types for 'c'; have 'int'
    6 |   int c=0;
      |       ^
main.c:4:20: note: previous declaration of 'c' with type 'char[20]'
    4 |   char a[20],b[20],c[20];
      |                    ^
Language: C

#include <stdio.h>
int cl(char *s){
  int c=0;
  while(1){
    if(s[c]=='\0')return c;
    c++;
}

int main(){
  int x,y;
  char a[20],b[20],c[20];
  scanf("%s %s %s",a,b,c);
  //x=cl(a);
  //y=cl(b);
  if(a[x-1]==b[0] && b[y-1]==c[0])puts("YES");
  else puts("NO");
  return 0;
}

Compiler output:
main.c: In function 'cl':
main.c:18:1: error: expected declaration or statement at end of input
   18 | }
      | ^
Language: C

#include <stdio.h>
/*int cl(char *s){
  int c=0;
  while(1){
    if(s[c]=='\0')return c;
    c++;
}
*/
int main(){
  int x,y;
  char a[20],b[20],c[20];
  scanf("%s %s %s",a,b,c);
  x=cl(a);
  y=cl(b);
  if(a[x-1]==b[0] && b[y-1]==c[0])puts("YES");
  else puts("NO");
  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:13:5: error: implicit declaration of function 'cl' [-Wimplicit-function-declaration]
   13 |   x=cl(a);
      |     ^~
Language: C

#include <stdio.h>
int cl(char *s){
  int c=0;
  while(1){
    if(s[c]=='\0')return c;
    c++;
}
int main(){
  int x,y;
  char a[20],b[20],c[20];
  //scanf("%s %s %s",a,b,c);
  //x=cl(a);
  //y=cl(b);
  //if(a[x-1]==b[0] && b[y-1]==c[0])puts("YES");
  //else puts("NO");
  return 0;
}

Compiler output:
main.c: In function 'cl':
main.c:17:1: error: expected declaration or statement at end of input
   17 | }
      | ^
Language: C

#include <stdio.h>
int cl(char *s){
  int c=0;
  while(1){
    if(s[c]=='\0')return c;
    c++;
}
int main(){
  int x,y;
  char a[20],b[20],c[20];
  scanf("%s %s %s",a,b,c);
  //x=cl(a);
  //y=cl(b);
  //if(a[x-1]==b[0] && b[y-1]==c[0])puts("YES");
  //else puts("NO");
  return 0;
}

Compiler output:
main.c: In function 'cl':
main.c:17:1: error: expected declaration or statement at end of input
   17 | }
      | ^
Language: C

#include <stdio.h>
int cl(char *s){
  int c=0;
  while(1){
    if(s[c]=='\0')return c;
    c++;
}
int main(){
  int x,y;
  char a[20],b[20],c[20];
  scanf("%s %s %s",a,b,c);
  //x=cl(a);
  //y=cl(b);
  if(a[x-1]==b[0] && b[y-1]==c[0])puts("YES");
  else puts("NO");
  return 0;
}

Compiler output:
main.c: In function 'cl':
main.c:17:1: error: expected declaration or statement at end of input
   17 | }
      | ^
Language: C

#include <stdio.h>
int cl(char *s){
  int c=0;
  while(1){
    if(s[c]=='\0')return c;
    c++;
}
int main(){
  int x,y;
  char a[20],b[20],c[20];
  scanf("%s %s %s",a,b,c);
  x=cl(a);
  y=cl(b);
  if(a[x-1]==b[0] && b[y-1]==c[0])puts("YES");
  else puts("NO");
  return 0;
}

Compiler output:
main.c: In function 'cl':
main.c:17:1: error: expected declaration or statement at end of input
   17 | }
      | ^
Language: C

#include <stdio.h>
int cl(char *a){
  int c=0;
  while(1){
    if(a[c]=='\n')return c;
    c++;
}
int main(){
  int x,y;
  char a[20],b[20],c[20];
  scanf("%s %s %s",a,b,c);
  x=cl(a);
  y=cl(b);
  if(a[x-1]==b[0])if(b[y-1]==c[0])puts("YES");
  else puts("NO");
  return 0;
}

Compiler output:
main.c: In function 'cl':
main.c:17:1: error: expected declaration or statement at end of input
   17 | }
      | ^
Language: C

#include <stdio.h>
int cl(*char a){
  int c=0;
  while(1){
    if(a[c]=='\n')return c;
    c++;
}
int main(){
  int x,y;
  char a[20],b[20],c[20];
  scanf("%s %s %s",a,b,c);
  x=cl(a);
  y=cl(b);
  if(a[x-1]==b[0])if(b[y-1]==c[0])puts("YES");
  else puts("NO");
  return 0;
}

Compiler output:
main.c:2:8: error: expected declaration specifiers or '...' before '*' token
    2 | int cl(*char a){
      |        ^
Language: C

#include <stdio.h>j
int cl(*char a){
  int c=0;
  while(1){
    if(a[c]=='\n')return c;
    c++;
}
int main(){
  int x,y;
  char a[20],b[20],c[20];
  scanf("%s %s %s",a,b,c);
  x=cl(a);
  y=cl(b);
  if(a[x-1]==b[0])if(b[y-1]==c[0])puts("YES");
  else puts("NO");
  return 0;
}

Compiler output:
main.c:1:19: warning: extra tokens at end of #include directive
    1 | #include <stdio.h>j
      |                   ^
main.c:2:8: error: expected declaration specifiers or '...' before '*' token
    2 | int cl(*char a){
      |        ^
Language: C

#include <stdio.h>
int main(){
  int x,y;
  char a[],b[],c[];
  scanf("%s %s %s",a,b,c);
  x=sizeof(a)/sizeof(a[0]);
  y=sizeof(b)/sizeof(b[0]);
  if(a[x-2]==b[0])if(b[y-2]==c[0])puts("YES");
  else puts("NO");
  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:4:8: error: array size missing in 'a'
    4 |   char a[],b[],c[];
      |        ^
main.c:4:12: error: array size missing in 'b'
    4 |   char a[],b[],c[];
      |            ^
main.c:4:16: error: array size missing in 'c'
    4 |   char a[],b[],c[];
      |                ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  string A, B , C;
  cin >> A >> B >> C;

  string str1 = A;
  string str2 = B;
  string str3 = C;
  
  char a = str1.at(str1.size()-1);
  char b = str2.at(0);
  char c = str2.at(str2.size()-1);
  char d = str3.at(0);
  
	if(a == b && c == d){
      cout << YES << endl;
    }
  else if( a != b || c!= d) {
      cout << NO << endl;
  }
      
	
}

	


Compiler output:
a.cc: In function 'int main()':
a.cc:18:15: error: 'YES' was not declared in this scope
   18 |       cout << YES << endl;
      |               ^~~
a.cc:21:15: error: 'NO' was not declared in this scope
   21 |       cout << NO << endl;
      |               ^~
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  string A, B , C;
  cin >> A >> B >> C;

  string str1 = A;
  string str2 = B;
  string str3 = C;
  
  char a = str1.at(str1.size()-1);
  char b = str2.at(0);
  char c = str2.at(str2.size()-1);
  char d = str3.at(0)+
  
	if(a == b && c == d){
      cout << YES << endl;
    }
  else if( a != b || c!= d) {
      cout << NO << endl;
  }
      
	
}

	


Compiler output:
a.cc: In function 'int main()':
a.cc:17:9: error: expected primary-expression before 'if'
   17 |         if(a == b && c == d){
      |         ^~
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  string A, B , C;
  cin >> A >> B >> C;

  string str1 = A;
  string str2 = B;
  string str3 = C;
  
  char a = str1.at(str1.size()-1);
  char b = str2.at(0);
  char c = str2.at(str2.size()-1);
  char d = str3.at(0)
  
	if(a == b && c == d){
      cout << YES << endl;
    }
  else if( a != b || c!= d) {
      cout << NO << endl;
  }
      
	
}

	
}


Compiler output:
a.cc: In function 'int main()':
a.cc:17:9: error: expected ',' or ';' before 'if'
   17 |         if(a == b && c == d){
      |         ^~
a.cc:20:3: error: 'else' without a previous 'if'
   20 |   else if( a != b || c!= d) {
      |   ^~~~
a.cc:21:15: error: 'NO' was not declared in this scope
   21 |       cout << NO << endl;
      |               ^~
a.cc: At global scope:
a.cc:28:1: error: expected declaration before '}' token
   28 | }
      | ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  string A, B , C;
  cin >> A >> B >> C;

  string str1 = A;
  string str2 = B;
  string str3 = C;
  
  char a = str1.at(str1.size()-1);
  char b = str2.at(0);
  char c = str2.at(str2.size()-1);
  char d = str3.at(0)
  
	if(a == b && c == d){
      cout << YES << endl;
    }
  else {
      cout << NO << endl;
  }
      
	
}

	
}


Compiler output:
a.cc: In function 'int main()':
a.cc:17:9: error: expected ',' or ';' before 'if'
   17 |         if(a == b && c == d){
      |         ^~
a.cc:20:3: error: 'else' without a previous 'if'
   20 |   else {
      |   ^~~~
a.cc:21:15: error: 'NO' was not declared in this scope
   21 |       cout << NO << endl;
      |               ^~
a.cc: At global scope:
a.cc:28:1: error: expected declaration before '}' token
   28 | }
      | ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  string A, B , C;
  cin >> A >> B >> C;

  string str1 = A;
  string str2 = B;
  string str3 = C;
  
  char a = str1.end();
  char b = str2.begin();
  char c = str2.end();
  char d = str3.begin()
  
	if(a == b && c == d){
      cout << YES << endl;
    }
  else {
      cout << NO << endl;
  }
      
	
}

	
}


Compiler output:
a.cc: In function 'int main()':
a.cc:12:20: error: cannot convert 'std::__cxx11::basic_string<char>::iterator' to 'char' in initialization
   12 |   char a = str1.end();
      |            ~~~~~~~~^~
      |                    |
      |                    std::__cxx11::basic_string<char>::iterator
a.cc:13:22: error: cannot convert 'std::__cxx11::basic_string<char>::iterator' to 'char' in initialization
   13 |   char b = str2.begin();
      |            ~~~~~~~~~~^~
      |                      |
      |                      std::__cxx11::basic_string<char>::iterator
a.cc:14:20: error: cannot convert 'std::__cxx11::basic_string<char>::iterator' to 'char' in initialization
   14 |   char c = str2.end();
      |            ~~~~~~~~^~
      |                    |
      |                    std::__cxx11::basic_string<char>::iterator
a.cc:15:22: error: cannot convert 'std::__cxx11::basic_string<char>::iterator' to 'char' in initialization
   15 |   char d = str3.begin()
      |            ~~~~~~~~~~^~
      |                      |
      |                      std::__cxx11::basic_string<char>::iterator
a.cc:20:3: error: 'else' without a previous 'if'
   20 |   else {
      |   ^~~~
a.cc:21:15: error: 'NO' was not declared in this scope
   21 |       cout << NO << endl;
      |               ^~
a.cc: At global scope:
a.cc:28:1: error: expected declaration before '}' token
   28 | }
      | ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  string A, B , C;
  cin >> A >> B >> C;

  string str1 = A;
  string str2 = B;
  string str3 = C;
  
  char a = str1.end();
  char b = str2.at(0);
  char c = str2.end();
  char d = str3.at(0)
  
	if(a == b && c == d){
      cout << YES << endl;
    }
  else {
      cout << NO << endl;
  }
      
	
}

	


Compiler output:
a.cc: In function 'int main()':
a.cc:12:20: error: cannot convert 'std::__cxx11::basic_string<char>::iterator' to 'char' in initialization
   12 |   char a = str1.end();
      |            ~~~~~~~~^~
      |                    |
      |                    std::__cxx11::basic_string<char>::iterator
a.cc:14:20: error: cannot convert 'std::__cxx11::basic_string<char>::iterator' to 'char' in initialization
   14 |   char c = str2.end();
      |            ~~~~~~~~^~
      |                    |
      |                    std::__cxx11::basic_string<char>::iterator
a.cc:17:9: error: expected ',' or ';' before 'if'
   17 |         if(a == b && c == d){
      |         ^~
a.cc:20:3: error: 'else' without a previous 'if'
   20 |   else {
      |   ^~~~
a.cc:21:15: error: 'NO' was not declared in this scope
   21 |       cout << NO << endl;
      |               ^~
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  string A, B , C;
  cin >> A >> B >> C;

  string str1 = A;
  string str2 = B;
  string str3 = C;
  
  char a = str1.end();
  char b = str2.at(0);
  char c = str2.end();
  char d = str3.at(0)
  
	if(a == b && c == d){
      cout << YES << endl;
    }
  else {
      cout << NO << endl;
  }
      
	
}

	
}


Compiler output:
a.cc: In function 'int main()':
a.cc:12:20: error: cannot convert 'std::__cxx11::basic_string<char>::iterator' to 'char' in initialization
   12 |   char a = str1.end();
      |            ~~~~~~~~^~
      |                    |
      |                    std::__cxx11::basic_string<char>::iterator
a.cc:14:20: error: cannot convert 'std::__cxx11::basic_string<char>::iterator' to 'char' in initialization
   14 |   char c = str2.end();
      |            ~~~~~~~~^~
      |                    |
      |                    std::__cxx11::basic_string<char>::iterator
a.cc:17:9: error: expected ',' or ';' before 'if'
   17 |         if(a == b && c == d){
      |         ^~
a.cc:20:3: error: 'else' without a previous 'if'
   20 |   else {
      |   ^~~~
a.cc:21:15: error: 'NO' was not declared in this scope
   21 |       cout << NO << endl;
      |               ^~
a.cc: At global scope:
a.cc:28:1: error: expected declaration before '}' token
   28 | }
      | ^
Language: C++

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

int main()
{
  string s1, s2, s3; cin >> s1 >> s2 >> s3;
  cout << (s1.back() == s2.front() %% s2.back() == s3.front() ? "YES" : "NO");
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:37: error: expected primary-expression before '%' token
    8 |   cout << (s1.back() == s2.front() %% s2.back() == s3.front() ? "YES" : "NO");
      |                                     ^
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() - ] == c[0]) {
  	cout << "YES" << endl;
  }
      else{
      	cout << "NO" << endl;
      }
}



Compiler output:
a.cc: In function 'int main()':
a.cc:8:50: error: expected primary-expression before ']' token
    8 |   if ((a[a.size() - 1] == b[0]) && (b[b.size() - ] == c[0]) {
      |                                                  ^
a.cc:8:60: error: expected ')' before '{' token
    8 |   if ((a[a.size() - 1] == b[0]) && (b[b.size() - ] == c[0]) {
      |      ~                                                     ^~
      |                                                            )
a.cc:14:1: error: expected primary-expression before '}' token
   14 | }
      | ^
Language: C++

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

int main() {
  string a,b,c;
  cin>>a>>b>>c;
  if(a.at(a.sise()-1)==b.at(0)&&b.at(b.sise()-1)==c.at(0)){
    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 'sise'; did you mean 'size'?
    7 |   if(a.at(a.sise()-1)==b.at(0)&&b.at(b.sise()-1)==c.at(0)){
      |             ^~~~
      |             size
a.cc:7:40: error: 'std::string' {aka 'class std::__cxx11::basic_string<char>'} has no member named 'sise'; did you mean 'size'?
    7 |   if(a.at(a.sise()-1)==b.at(0)&&b.at(b.sise()-1)==c.at(0)){
      |                                        ^~~~
      |                                        size
Language: C++

# coding: utf-8
# Your code here!

A, B, C = map(str, input().split())
len_A = len(A)
len_B = len(B)
flag = 0

if A[len_A - 1] == B[0]:
    if B[len_B - 1] == C[0]:
        flag = 1
        print("YES")

if flag == 0:
    print("NO")

Compiler output:
a.cc:1:3: error: invalid preprocessing directive #coding
    1 | # coding: utf-8
      |   ^~~~~~
a.cc:2:3: error: invalid preprocessing directive #Your
    2 | # Your code here!
      |   ^~~~
a.cc:4:1: error: 'A' does not name a type
    4 | A, B, C = map(str, input().split())
      | ^
Language: Java

import java.util.Scanner;

public class main {

	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		String a = scan.next();
		String b = scan.next();
		String c = scan.next();
		String message = "NO";
		if(a.endsWith(b.charAt(0) + "")) {
			if(b.endsWith(c.charAt(0) + "")) {
				message = "YES";
			}
		}
		System.out.println(message);
	}
}

Compiler output:
Main.java:3: error: class main is public, should be declared in a file named main.java
public class main {
       ^
1 error
Language: C++

#include <cstdio>
#include <cstring>

char end(char* s){
    int l = strlen(s);
    return s[l-1];
}

int main(){
    char A[11], B[11], C[11];
    scanf("%s %s %s", A, B, C);
    if(end(A)==B[0]&&end(B)==C[0]) printf("YES\n")
    else printf("NO\n");
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:51: error: expected ';' before 'else'
   12 |     if(end(A)==B[0]&&end(B)==C[0]) printf("YES\n")
      |                                                   ^
      |                                                   ;
   13 |     else printf("NO\n");
      |     ~~~~
Language: C++

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

int main() {
  int A, B, C, N;
  cin >> A >> B >> C;
  N % A = 0;
  
  	for (int i = 0; i < N; i++) {
      int x;
      0 < x < (N + 1);
      if (A * x % B == C) {
        cout << "YES" << endl;
      }
      else {
        cout << "NO" << endl;
      }
    }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:5: error: lvalue required as left operand of assignment
    7 |   N % A = 0;
      |   ~~^~~
Language: C

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

int main() {
  ch ch;
  char str[11];
  scanf("%s", str);
  ch = str[strlen(str)-1];
  scanf("%s", str);
  if(ch != str[0]) {
    printf("NO\n");
  } else {
    ch = str[strlen(str)-1];
    scanf("%s", str);
    if(ch != str[0]) {
      printf("NO\n");
    } else {
      printf("YES\n");
    }
  }
  return 0;
}


Compiler output:
main.c: In function 'main':
main.c:5:3: error: unknown type name 'ch'; did you mean 'char'?
    5 |   ch ch;
      |   ^~
      |   char
Language: C++

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

int main() {
  string 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:7:45: error: extended character – is not valid in an identifier
    7 |   if (a[a.size() - 1] == b[0] && b[b.size() – 1] == c[0]) {
      |                                             ^
a.cc: In function 'int main()':
a.cc:7:44: error: expected ']' before '\U00002013'
    7 |   if (a[a.size() - 1] == b[0] && b[b.size() – 1] == c[0]) {
      |                                            ^~
      |                                            ]
a.cc:7:44: error: expected ')' before '\U00002013'
    7 |   if (a[a.size() - 1] == b[0] && b[b.size() – 1] == c[0]) {
      |      ~                                     ^~
      |                                            )
a.cc:7:48: error: expected primary-expression before ']' token
    7 |   if (a[a.size() - 1] == b[0] && b[b.size() – 1] == c[0]) {
      |                                                ^
Language: C++

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

int main() {
  string str 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:7:45: error: extended character – is not valid in an identifier
    7 |   if (a[a.size() - 1] == b[0] && b[b.size() – 1] == c[0]) {
      |                                             ^
a.cc: In function 'int main()':
a.cc:6:14: error: expected initializer before 'a'
    6 |   string str a, b, c
      |              ^
a.cc:9:5: error: 'else' without a previous 'if'
    9 |   } else {
      |     ^~~~
Language: C++

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

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: In function 'int main()':
a.cc:14:51: error: expected ';' before 'cout'
   14 |  if(A[A.size()-1] == B[0] && B[B.size()-1] == C[0] cout << "YES" << endl;
      |                                                   ^~~~~
      |                                                   ;
a.cc:15:2: error: expected primary-expression before 'else'
   15 |  else cout << "NO" << endl;
      |  ^~~~
a.cc:14:74: error: expected ')' before 'else'
   14 |  if(A[A.size()-1] == B[0] && B[B.size()-1] == C[0] cout << "YES" << endl;
      |    ~                                                                     ^
      |                                                                          )
   15 |  else cout << "NO" << endl;
      |  ~~~~
Language: C++

a, b, c = input().split()
if a[len(a)-1] == b[0] and b[len(b)-1] == c[0]:
     print(’YES’)
else:
print(’NO’)
 

Compiler output:
a.cc:3:12: error: extended character ’ is not valid in an identifier
    3 |      print(’YES’)
      |            ^
a.cc:3:12: error: extended character ’ is not valid in an identifier
a.cc:5:7: error: extended character ’ is not valid in an identifier
    5 | print(’NO’)
      |       ^
a.cc:5:7: error: extended character ’ is not valid in an identifier
a.cc:1:1: error: 'a' does not name a type
    1 | a, b, c = input().split()
      | ^
Language: C++

#include<iostream>
#include<string>
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:
a.cc: In function 'int main()':
a.cc:7:41: error: expected ']' before '_1'
    7 |   if(a[a.size()-1] == b[0] && b[b.size()_1] == c[0])
      |                                         ^~
      |                                         ]
a.cc:7:41: error: expected ')' before '_1'
    7 |   if(a[a.size()-1] == b[0] && b[b.size()_1] == c[0])
      |     ~                                   ^~
      |                                         )
a.cc:7:43: error: expected primary-expression before ']' token
    7 |   if(a[a.size()-1] == b[0] && b[b.size()_1] == c[0])
      |                                           ^
Language: C++

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

int main(void){
  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;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:61: error: expected ')' before 'cout'
    7 |   if((a.at(a.size()-1)==b.at(0)&&(b.at(b.size()-1)==c.at(0))
      |      ~                                                      ^
      |                                                             )
    8 |     cout<<"YES"<<endl;
      |     ~~~~                                                     
a.cc:8:22: error: expected ')' before ';' token
    8 |     cout<<"YES"<<endl;
      |                      ^
      |                      )
a.cc:7:5: note: to match this '('
    7 |   if((a.at(a.size()-1)==b.at(0)&&(b.at(b.size()-1)==c.at(0))
      |     ^
Language: C++

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

int main{
	string a, b, c;
	cin >> a >> b >> c;
	int an= a.size()-1,bn= b.size()-1,cn= c.size()-1;
	if(a.at(an) != b.at(0) ){
		cout<< "NO" << endl;
	}
	else if(a.at(bn)!= c.at(0)){
		cout << "NO" << endl;
	}
	else{
		cout << "YES" <<endl;
}
		
	return 0;
}

Compiler output:
a.cc:5:5: error: cannot declare '::main' to be a global variable
    5 | int main{
      |     ^~~~
a.cc:6:16: error: expected primary-expression before 'a'
    6 |         string a, b, c;
      |                ^
a.cc:6:16: error: expected '}' before 'a'
a.cc:5:9: note: to match this '{'
    5 | int main{
      |         ^
a.cc:7:9: error: 'cin' does not name a type
    7 |         cin >> a >> b >> c;
      |         ^~~
a.cc:8:17: error: 'a' was not declared in this scope; did you mean 'an'?
    8 |         int an= a.size()-1,bn= b.size()-1,cn= c.size()-1;
      |                 ^
      |                 an
a.cc:9:9: error: expected unqualified-id before 'if'
    9 |         if(a.at(an) != b.at(0) ){
      |         ^~
a.cc:12:9: error: expected unqualified-id before 'else'
   12 |         else if(a.at(bn)!= c.at(0)){
      |         ^~~~
a.cc:15:9: error: expected unqualified-id before 'else'
   15 |         else{
      |         ^~~~
a.cc:19:9: error: expected unqualified-id before 'return'
   19 |         return 0;
      |         ^~~~~~
a.cc:20:1: error: expected declaration before '}' token
   20 | }
      | ^
Language: C++

#include <iostream>
using namespace std;

int main{
	string a, b, c;
	cin >> a >> b >> c;
	int an= a.size()-1,bn= b.size()-1,cn= c.size()-1;
	if(a.at(an) != b.at(0) ){
		cout<< "NO" << endl;
	}
	else if(a.at(bn)!= c.at(0)){
		cout << "NO" << endl;
	}
	else{
		cout << "YES" <<endl;
}
		
	return 0;
}

Compiler output:
a.cc:4:5: error: cannot declare '::main' to be a global variable
    4 | int main{
      |     ^~~~
a.cc:5:16: error: expected primary-expression before 'a'
    5 |         string a, b, c;
      |                ^
a.cc:5:16: error: expected '}' before 'a'
a.cc:4:9: note: to match this '{'
    4 | int main{
      |         ^
a.cc:6:9: error: 'cin' does not name a type
    6 |         cin >> a >> b >> c;
      |         ^~~
a.cc:7:17: error: 'a' was not declared in this scope; did you mean 'an'?
    7 |         int an= a.size()-1,bn= b.size()-1,cn= c.size()-1;
      |                 ^
      |                 an
a.cc:8:9: error: expected unqualified-id before 'if'
    8 |         if(a.at(an) != b.at(0) ){
      |         ^~
a.cc:11:9: error: expected unqualified-id before 'else'
   11 |         else if(a.at(bn)!= c.at(0)){
      |         ^~~~
a.cc:14:9: error: expected unqualified-id before 'else'
   14 |         else{
      |         ^~~~
a.cc:18:9: error: expected unqualified-id before 'return'
   18 |         return 0;
      |         ^~~~~~
a.cc:19:1: error: expected declaration before '}' token
   19 | }
      | ^
Language: C++

#include <iostream>
using namespace std;

int main{
	string a, b, c;
	cin >> a >> b >> c;
	an= a.size()-1;
	bn= b.size()-1;
	cn= c.size()-1;
	if(a.at(an) != b.at(0) ){
		cout<< "NO" << endl;
	}
	else if(a.at(bn)!= c.at(0)){
		cout << "NO" << endl;
	}
	else{cout << "YES" <<endl;
	
	
}
		
	return 0;
}

Compiler output:
a.cc:4:5: error: cannot declare '::main' to be a global variable
    4 | int main{
      |     ^~~~
a.cc:5:16: error: expected primary-expression before 'a'
    5 |         string a, b, c;
      |                ^
a.cc:5:16: error: expected '}' before 'a'
a.cc:4:9: note: to match this '{'
    4 | int main{
      |         ^
a.cc:6:9: error: 'cin' does not name a type
    6 |         cin >> a >> b >> c;
      |         ^~~
a.cc:7:9: error: 'an' does not name a type
    7 |         an= a.size()-1;
      |         ^~
a.cc:8:9: error: 'bn' does not name a type
    8 |         bn= b.size()-1;
      |         ^~
a.cc:9:9: error: 'cn' does not name a type
    9 |         cn= c.size()-1;
      |         ^~
a.cc:10:9: error: expected unqualified-id before 'if'
   10 |         if(a.at(an) != b.at(0) ){
      |         ^~
a.cc:13:9: error: expected unqualified-id before 'else'
   13 |         else if(a.at(bn)!= c.at(0)){
      |         ^~~~
a.cc:16:9: error: expected unqualified-id before 'else'
   16 |         else{cout << "YES" <<endl;
      |         ^~~~
a.cc:21:9: error: expected unqualified-id before 'return'
   21 |         return 0;
      |         ^~~~~~
a.cc:22:1: error: expected declaration before '}' token
   22 | }
      | ^
Language: C++

#include <iostream>
using namespace std;

int main{
	string a, b, c;
	cin >> a >> b >> c;
	an= a.size()-1
	bn= b.size()-1
	cn= c.size()-1
	if(a.at(an) != b.at(0) ){
		cout<< "NO" << endl;
	}
	else if(a.at(bn)!= c.at(0)){
		cout << "NO" << endl;
	}
	else{cout << "YES" <<endl;
	
	
}
		
	return 0;
}

Compiler output:
a.cc:4:5: error: cannot declare '::main' to be a global variable
    4 | int main{
      |     ^~~~
a.cc:5:16: error: expected primary-expression before 'a'
    5 |         string a, b, c;
      |                ^
a.cc:5:16: error: expected '}' before 'a'
a.cc:4:9: note: to match this '{'
    4 | int main{
      |         ^
a.cc:6:9: error: 'cin' does not name a type
    6 |         cin >> a >> b >> c;
      |         ^~~
a.cc:7:9: error: 'an' does not name a type
    7 |         an= a.size()-1
      |         ^~
a.cc:13:9: error: expected unqualified-id before 'else'
   13 |         else if(a.at(bn)!= c.at(0)){
      |         ^~~~
a.cc:16:9: error: expected unqualified-id before 'else'
   16 |         else{cout << "YES" <<endl;
      |         ^~~~
a.cc:21:9: error: expected unqualified-id before 'return'
   21 |         return 0;
      |         ^~~~~~
a.cc:22:1: error: expected declaration before '}' token
   22 | }
      | ^
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(1)){
    cout << "YES";
    else {cout << "NO";}
  }
  

Compiler output:
a.cc: In function 'int main()':
a.cc:9:5: error: expected '}' before 'else'
    9 |     else {cout << "NO";}
      |     ^~~~
a.cc:7:64: note: to match this '{'
    7 |   if(A.at(A.size()-1)  == B.at(0)&&B.at(B.size()-1) == C.at(1)){
      |                                                                ^
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(1)){
    cout << YES;
    else {cout << NO;}
  }
  

Compiler output:
a.cc: In function 'int main()':
a.cc:8:13: error: 'YES' was not declared in this scope
    8 |     cout << YES;
      |             ^~~
a.cc:9:5: error: expected '}' before 'else'
    9 |     else {cout << NO;}
      |     ^~~~
a.cc:7:64: note: to match this '{'
    7 |   if(A.at(A.size()-1)  == B.at(0)&&B.at(B.size()-1) == C.at(1)){
      |                                                                ^
a.cc:9:19: error: 'NO' was not declared in this scope
    9 |     else {cout << NO;}
      |                   ^~
Language: C++

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

int main(){
    string a, b, c;
    cin>>a>>b>>c;
    an = a.size();
    bn = b.size();
    cn = c.size();

    if(a[an-1] == b[0] && b[bn-1] == c[0]){
        cout<<"YES"<<endl;
    }
    else{
        cout<<"NO"<<endl;
    }
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:5: error: 'an' was not declared in this scope; did you mean 'a'?
   10 |     an = a.size();
      |     ^~
      |     a
a.cc:11:5: error: 'bn' was not declared in this scope; did you mean 'b'?
   11 |     bn = b.size();
      |     ^~
      |     b
a.cc:12:5: error: 'cn' was not declared in this scope; did you mean 'c'?
   12 |     cn = c.size();
      |     ^~
      |     c
Language: C++

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

using ll = long long int;

const int MAX = (int)(1e5 + 5);
const ll INF = (ll)(1e10 + 5);

string a, b, c;

int main(void) {
  // Here your code !
  cin >> a >> b >> c;

  if (a.back() == b[0] && b.back() == c[0]) {
    printf("YES\n");
  }
  else {
    printf("NO\n", );
  }

  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:19:20: error: expected primary-expression before ')' token
   19 |     printf("NO\n", );
      |                    ^
Language: C++

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

int main(){
  string a,b,c;
  cin>>a>>b>>c;
  
  if(a.at(s.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:8:11: error: 's' was not declared in this scope
    8 |   if(a.at(s.size()-1)==b.at(0)&&b.at(b.size()-1)==c.at(0))
      |           ^
Language: C++

#include<iostream>
#include<string>

using namespace std;

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

Compiler output:
a.cc: In function 'int main()':
a.cc:9:10: 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 '()' ?)
    9 |   if(a[a.length-1]==b[0]&&b[b.length-1]==c[0])
      |        ~~^~~~~~
      |                ()
a.cc:9:31: 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 '()' ?)
    9 |   if(a[a.length-1]==b[0]&&b[b.length-1]==c[0])
      |                             ~~^~~~~~
      |                                     ()
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:9:11: error: invalid operands of types '<unresolved overloaded function type>' and 'const char [3]' to binary 'operator<<'
    9 |     count << "NO" << endl;
      |     ~~~~~~^~~~~~~