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

#include<iostream>
#include<string>
using namespace std;
int main() {
	string A, B, C;
	cin >> A >> B >> C;
	if (A.at[A] == B.at[0] && B.at[B] == C.at[0]) {
		cout << "YES" << endl;
	}
	else cout << "NO" << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:17: error: no match for 'operator[]' (operand types are '<unresolved overloaded function type>' and 'std::string' {aka 'std::__cxx11::basic_string<char>'})
    7 |         if (A.at[A] == B.at[0] && B.at[B] == C.at[0]) {
      |                 ^
a.cc:7:28: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
    7 |         if (A.at[A] == B.at[0] && B.at[B] == C.at[0]) {
      |                            ^
a.cc:7:39: error: no match for 'operator[]' (operand types are '<unresolved overloaded function type>' and 'std::string' {aka 'std::__cxx11::basic_string<char>'})
    7 |         if (A.at[A] == B.at[0] && B.at[B] == C.at[0]) {
      |                                       ^
a.cc:7:50: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
    7 |         if (A.at[A] == B.at[0] && B.at[B] == C.at[0]) {
      |                                                  ^
Language: C++

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

Compiler output:
a.cc: In function 'int main()':
a.cc:7:17: error: no match for 'operator[]' (operand types are '<unresolved overloaded function type>' and 'std::string' {aka 'std::__cxx11::basic_string<char>'})
    7 |         if (a.at[a] == b.at[0] && b.at[b] == c.at[0]) {
      |                 ^
a.cc:7:28: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
    7 |         if (a.at[a] == b.at[0] && b.at[b] == c.at[0]) {
      |                            ^
a.cc:7:39: error: no match for 'operator[]' (operand types are '<unresolved overloaded function type>' and 'std::string' {aka 'std::__cxx11::basic_string<char>'})
    7 |         if (a.at[a] == b.at[0] && b.at[b] == c.at[0]) {
      |                                       ^
a.cc:7:50: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
    7 |         if (a.at[a] == b.at[0] && b.at[b] == c.at[0]) {
      |                                                  ^
Language: C++

#include <iostream>
#include <string>

using namespace std;

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

Compiler output:
a.cc: In function 'int main()':
a.cc:9:42: error: expected primary-expression before '=' token
    9 |   if(b[b.size()-1]==c[0]&&a[a.size()-1]===b[0]){
      |                                          ^
Language: C++

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

#define ll          long long
#define pb          push_back
#define pii         pair<int,int>
#define pll         pair<long,long>
#define vi          vector<int>
#define vll         vector<ll>
#define vii         vector<pii>
#define mi          map<int,int>
#define mii         map<pii,int>
#define all(a)      (a).begin(),(a).end()
#define x           first
#define y           second
#define sz(x)       (int)x.size()
#define endl        '\n'
#define mod        1000000007
#define rep(i,a,b)  for(int i=a;i<b;i++)
#define rem(i,a,b)  for(int i=a;i>b;i--)
#define mp(a,b)     make_pair(a,b)
#define vvi(a,b,name)    vector<vector<int>> name(a,vector<int>(b,-1))


void solve(){
    string s1,s2,s3;cin>>s1>>s2>>s3;
    if(s1[s1.length()-1]==s2[0] && s2[s2.length()-1]==s3[0])cout<<"YES";
    else cout<<"NO";

}
int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    long t=1;
    //cin>>t;
    while(t--){
        solve();
    }
    return 0;
}


Compiler output:
a.cc:1:1: error: stray '##' in program
    1 | ##include <bits/stdc++.h>
      | ^~
a.cc:1:3: error: 'include' does not name a type
    1 | ##include <bits/stdc++.h>
      |   ^~~~~~~
a.cc: In function 'void solve()':
a.cc:26:5: error: 'string' was not declared in this scope
   26 |     string s1,s2,s3;cin>>s1>>s2>>s3;
      |     ^~~~~~
a.cc:26:21: error: 'cin' was not declared in this scope
   26 |     string s1,s2,s3;cin>>s1>>s2>>s3;
      |                     ^~~
a.cc:26:26: error: 's1' was not declared in this scope; did you mean 'sz'?
   26 |     string s1,s2,s3;cin>>s1>>s2>>s3;
      |                          ^~
      |                          sz
a.cc:26:30: error: 's2' was not declared in this scope; did you mean 'sz'?
   26 |     string s1,s2,s3;cin>>s1>>s2>>s3;
      |                              ^~
      |                              sz
a.cc:26:34: error: 's3' was not declared in this scope; did you mean 'sz'?
   26 |     string s1,s2,s3;cin>>s1>>s2>>s3;
      |                                  ^~
      |                                  sz
a.cc:27:61: error: 'cout' was not declared in this scope
   27 |     if(s1[s1.length()-1]==s2[0] && s2[s2.length()-1]==s3[0])cout<<"YES";
      |                                                             ^~~~
a.cc:28:10: error: 'cout' was not declared in this scope
   28 |     else cout<<"NO";
      |          ^~~~
a.cc: In function 'int main()':
a.cc:32:5: error: 'ios' has not been declared
   32 |     ios::sync_with_stdio(false);
      |     ^~~
a.cc:33:5: error: 'cin' was not declared in this scope
   33 |     cin.tie(0);
      |     ^~~
a.cc:34:5: error: 'cout' was not declared in this scope
   34 |     cout.tie(0);
      |     ^~~~
Language: Java

import java.util.*;

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();

			if((A.substring(A.length()-1,A.length)).equals(B.substring(0,1)) && (B.substring(B.length()-1,B.length)).equals(c.substring(0,1)){
				System.out.println("YES");
			}else{
				System.out.println("NO");
			}
	}
}

Compiler output:
Main.java:11: error: ')' expected
			if((A.substring(A.length()-1,A.length)).equals(B.substring(0,1)) && (B.substring(B.length()-1,B.length)).equals(c.substring(0,1)){
			                                                                                                                                 ^
1 error
Language: Java

import java.util.*;

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();

			if((A.substring(A.lengt()-1,A.lengtj)).equals(B.substring(0,1)) && (B.substring(B.lengt()-1,B.lengtj)).equals(c.substring(0,1)){
				System.out.println("YES");
			}else{
				System.out.println("NO");
			}
	}
}

Compiler output:
Main.java:11: error: ')' expected
			if((A.substring(A.lengt()-1,A.lengtj)).equals(B.substring(0,1)) && (B.substring(B.lengt()-1,B.lengtj)).equals(c.substring(0,1)){
			                                                                                                                               ^
1 error
Language: Java

import java.util.*;
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();
    
    aLast = a.substring(a.length() - 1);
    bFirst = b.substring(0, 1);
    bLast = b.substring(b.length() - 1);
    cFirst = c.substring(0, 1);
    
    if (aLast.equals(bFirst) && bLast.equals(cFirst)) {
      System.out.println("YES");
    } else {
      System.out.println("NO");
    }
  }
}

Compiler output:
Main.java:10: error: cannot find symbol
    aLast = a.substring(a.length() - 1);
    ^
  symbol:   variable aLast
  location: class Main
Main.java:11: error: cannot find symbol
    bFirst = b.substring(0, 1);
    ^
  symbol:   variable bFirst
  location: class Main
Main.java:12: error: cannot find symbol
    bLast = b.substring(b.length() - 1);
    ^
  symbol:   variable bLast
  location: class Main
Main.java:13: error: cannot find symbol
    cFirst = c.substring(0, 1);
    ^
  symbol:   variable cFirst
  location: class Main
Main.java:15: error: cannot find symbol
    if (aLast.equals(bFirst) && bLast.equals(cFirst)) {
                     ^
  symbol:   variable bFirst
  location: class Main
Main.java:15: error: cannot find symbol
    if (aLast.equals(bFirst) && bLast.equals(cFirst)) {
        ^
  symbol:   variable aLast
  location: class Main
Main.java:15: error: cannot find symbol
    if (aLast.equals(bFirst) && bLast.equals(cFirst)) {
                                             ^
  symbol:   variable cFirst
  location: class Main
Main.java:15: error: cannot find symbol
    if (aLast.equals(bFirst) && bLast.equals(cFirst)) {
                                ^
  symbol:   variable bLast
  location: class Main
8 errors
Language: C++

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

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;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:67: error: invalid operands of types 'const char [3]' and '<unresolved overloaded function type>' to binary 'operator<<'
    7 |   cout << (a[a.size()-1]==b[0] && b[b.size()-1]==c[0])?"YES":"NO" << endl;
      |                                                              ~~~~~^~~~~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define IOS ios::sync_with_stdio(false); cin.tie(0);
#define FOR(i,s,n) for(int i = s; i < (n); i++)
#define REP(i,n) FOR(i,0,n)
#define ALL(n) (n).begin(), (n).end()
#define RALL(n) (n).rbegin(), (n).rend()
#define ATYN(n) cout << ( (n) ? "Yes":"No") << endl;
#define CFYN(n) cout << ( (n) ? "YES":"NO") << endl;
using ll = long long;
using ull = unsigned long long;
using pii = pair<int,int>;

int main(void)
{
    IOS
    string a,b,c;
    cin >> a >> b >> c;
    bool ans == false;
    if (a.back() == b.front() && b.back() == c.front()) ans = true;
    CFYN(ans);

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:19:14: error: expected initializer before '==' token
   19 |     bool ans == false;
      |              ^~
a.cc:20:57: error: 'ans' was not declared in this scope; did you mean 'abs'?
   20 |     if (a.back() == b.front() && b.back() == c.front()) ans = true;
      |                                                         ^~~
      |                                                         abs
a.cc:21:10: error: 'ans' was not declared in this scope; did you mean 'abs'?
   21 |     CFYN(ans);
      |          ^~~
a.cc:9:28: note: in definition of macro 'CFYN'
    9 | #define CFYN(n) cout << ( (n) ? "YES":"NO") << endl;
      |                            ^
Language: C++

#include<vector>
#include<string>

using namespace std;

int main(){
  
  string a,b,c;
  //cin>>n;//読み込み

  //cout<<n<<endl;//System.out.println
  
    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:13:5: error: 'cin' was not declared in this scope
   13 |     cin>>a>>b>>c;
      |     ^~~
a.cc:3:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
    2 | #include<string>
  +++ |+#include <iostream>
    3 | 
a.cc:16:3: error: 'cout' was not declared in this scope
   16 |   cout<<"YES"<<endl;
      |   ^~~~
a.cc:16:3: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:16:16: error: 'endl' was not declared in this scope
   16 |   cout<<"YES"<<endl;
      |                ^~~~
a.cc:3:1: note: 'std::endl' is defined in header '<ostream>'; this is probably fixable by adding '#include <ostream>'
    2 | #include<string>
  +++ |+#include <ostream>
    3 | 
a.cc:18:7: error: 'cout' was not declared in this scope
   18 |       cout<<"NO"<<endl;
      |       ^~~~
a.cc:18:7: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:18:19: error: 'endl' was not declared in this scope
   18 |       cout<<"NO"<<endl;
      |                   ^~~~
a.cc:18:19: note: 'std::endl' is defined in header '<ostream>'; this is probably fixable by adding '#include <ostream>'
Language: C++

S = input().split()

if S[0][len(S[0])-1] != S[1][0] or S[1][len(S[1])-1] != S[2][0]:
    print("NO")
else:
    print("YES")

Compiler output:
a.cc:1:1: error: 'S' does not name a type
    1 | S = input().split()
      | ^
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;
  return 0;
}

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

#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
 
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"<<endl;
  else{cout <<"NO" << endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:2: error: expected '}' at end of input
   11 | }
      |  ^
a.cc:5:11: note: to match this '{'
    5 | int main(){
      |           ^
Language: C++

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

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

using namespace std;

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


Compiler output:
a.cc: In function 'int main()':
a.cc:9:8: 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 '()' ?)
    9 |   (a[a.size-1]==b[0] &&b[b.size-1]==c[0])? cout<<"YES":cout<<"NO";
      |      ~~^~~~
      |            ()
a.cc:9:28: 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 '()' ?)
    9 |   (a[a.size-1]==b[0] &&b[b.size-1]==c[0])? cout<<"YES":cout<<"NO";
      |                          ~~^~~~
      |                                ()
Language: C++

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

using namespace std;

int main(){
  int a,b,c; cin>>a>>b>>c;
  (a[a.size-1]==b[0] &&b[b.size-1]==c[0])? cout<<"YES":cout<<"NO";
  
  
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:8: error: request for member 'size' in 'a', which is of non-class type 'int'
    9 |   (a[a.size-1]==b[0] &&b[b.size-1]==c[0])? cout<<"YES":cout<<"NO";
      |        ^~~~
a.cc:9:18: error: invalid types 'int[int]' for array subscript
    9 |   (a[a.size-1]==b[0] &&b[b.size-1]==c[0])? cout<<"YES":cout<<"NO";
      |                  ^
a.cc:9:28: error: request for member 'size' in 'b', which is of non-class type 'int'
    9 |   (a[a.size-1]==b[0] &&b[b.size-1]==c[0])? cout<<"YES":cout<<"NO";
      |                            ^~~~
a.cc:9:38: error: invalid types 'int[int]' for array subscript
    9 |   (a[a.size-1]==b[0] &&b[b.size-1]==c[0])? cout<<"YES":cout<<"NO";
      |                                      ^
Language: C

#include <stdio.h>

int main () {
    char A[101];
    char B[101];
    char C[101];
    scanf("%s", A);
    scanf("%s", B);
    scanf("%s", C);

    char aux;

//para ser uma cadeia de palavras, última letra de A, tem que ser igual a última
//de b e a primeira de B tem que ser igual a última de C.
    for (int i=0; i<100; i++){
        if (int strcmp(const char *A, const char *B && const char *B, const char *C));
            printf("\n",YES);
    }
    if else{
        printf ("\n", NO);
    }
    return 0;
}


Compiler output:
main.c: In function 'main':
main.c:16:13: error: expected expression before 'int'
   16 |         if (int strcmp(const char *A, const char *B && const char *B, const char *C));
      |             ^~~
main.c:17:25: error: 'YES' undeclared (first use in this function)
   17 |             printf("\n",YES);
      |                         ^~~
main.c:17:25: note: each undeclared identifier is reported only once for each function it appears in
main.c:19:8: error: expected '(' before 'else'
   19 |     if else{
      |        ^~~~
      |        (
Language: C

#include <stdio.h>

int main () {
    char A[99], B[99], C[99];
    char S[99];

    scanf("%s %s %s", A, B, C);
        if ((B[1] == A[]) && (C[1] == B[]))
            printf("YES\n");
        else
            printf("NO\n");

    return 0;
}


Compiler output:
main.c: In function 'main':
main.c:8:24: error: expected expression before ']' token
    8 |         if ((B[1] == A[]) && (C[1] == B[]))
      |                        ^
Language: C

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

int main(void){
  char a[10], b[10], c[10];
  int am, bm, cm;
  
  am = strlen(a);
  bm = strlen(b);
  cm = strlen(c);
  
  if(a[am - 1] == b[0] && b[bm - 1] == c[0]) {
    printf("YES");
  }
  else {
    printf("NO");
  }
  return 0;
}

Compiler output:
main.c:2:9: fatal error: string: No such file or directory
    2 | #include<string>
      |         ^~~~~~~~
compilation terminated.
Language: C++

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


Compiler output:
a.cc: In function 'int main()':
a.cc:8:6: error: 'at' was not declared in this scope; did you mean 'a'?
    8 | if(a,at(a.size()-1) == b.at(0)){
      |      ^~
      |      a
Language: C++

#include <bits/stdc++.h>
#include <ctype.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 if (a == b && b == c ) cout << "YES" << endl;
else cout << "NO" << endl;
}


Compiler output:
a.cc:6:14: error: extended character 　 is not valid in an identifier
    6 | string a,b,c;　
      |              ^
a.cc: In function 'int main()':
a.cc:6:14: error: '\U00003000' was not declared in this scope
    6 | string a,b,c;　
      |              ^~
Language: C++

#include <bits/stdc++.h>
#include <ctype.h>
using namespace std;
 
int main() {
string a,b,c;　
cin >> a >> b >> c;

if(a.at(a.size()-1) == b.at(0)){
if(b.at(b.size()-1) == c.at(0)){
cout << "YES" << endl;
}
else cout << "NO" << endl;
}
else cout << "NO" << endl;

}


Compiler output:
a.cc:6:14: error: extended character 　 is not valid in an identifier
    6 | string a,b,c;　
      |              ^
a.cc: In function 'int main()':
a.cc:6:14: error: '\U00003000' was not declared in this scope
    6 | string a,b,c;　
      |              ^~
Language: C++

#include <bits/stdc++.h>
#include <ctype.h>
using namespace std;
 
int main() {
string a,b,c;　
cin >> a >> b >> c;

if(a,at(a.size()-1) == b.at(0)){
if(b.at(b.size()-1) == c.at(0)){
cout << "YES" << endl;
}
else cout << "NO" << endl;
}
else cout << "NO" << endl;

}


Compiler output:
a.cc:6:14: error: extended character 　 is not valid in an identifier
    6 | string a,b,c;　
      |              ^
a.cc: In function 'int main()':
a.cc:6:14: error: '\U00003000' was not declared in this scope
    6 | string a,b,c;　
      |              ^~
a.cc:9:6: error: 'at' was not declared in this scope; did you mean 'a'?
    9 | if(a,at(a.size()-1) == b.at(0)){
      |      ^~
      |      a
Language: C++

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:1:14: error: extended character 　 is not valid in an identifier
    1 | string a,b,c;　
      |              ^
a.cc:1:1: error: 'string' does not name a type
    1 | string a,b,c;　
      | ^~~~~~
a.cc:1:14: error: '\U00003000' does not name a type
    1 | string a,b,c;　
      |              ^~
a.cc:3:1: error: expected unqualified-id before 'if'
    3 | if(a.end() == b.begin() && b.end() == c.begin())cout << "YES" << endl;
      | ^~
a.cc:4:1: error: expected unqualified-id before 'else'
    4 | else cout << "NO" << endl;
      | ^~~~
Language: C++

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

int main() {
	char a[10]=, b[10], c[10];
  cin >> a >> b >> c;
  if (a[strlen(a)-1]==b[0] && b[strlen(b)-1] == c[0])
    cout << "YES";
  else cout << "NO";
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:20: error: expected primary-expression before ',' token
    5 |         char a[10]=, b[10], c[10];
      |                    ^
a.cc:6:15: error: 'b' was not declared in this scope
    6 |   cin >> a >> b >> c;
      |               ^
a.cc:6:20: error: 'c' was not declared in this scope
    6 |   cin >> a >> b >> c;
      |                    ^
Language: C++

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

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

Compiler output:
a.cc: In function 'int main()':
a.cc:5:17: error: expected initializer before '==' token
    5 |         string a=="", b="", c="";
      |                 ^~
a.cc:6:10: error: 'a' was not declared in this scope
    6 |   cin >> a >> b >> c;
      |          ^
a.cc:6:15: error: 'b' was not declared in this scope
    6 |   cin >> a >> b >> c;
      |               ^
a.cc:6:20: error: 'c' was not declared in this scope
    6 |   cin >> a >> b >> c;
      |                    ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(){
    int  a, b ,c;
    char X,Y;
    string S1,S2,S3;
    cin >>S1 >> S2 >> S3;
    if(S1[S.size() - 1] == S2[0] && S2[S2.size() - 1] == S3[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; did you mean 'S3'?
    8 |     if(S1[S.size() - 1] == S2[0] && S2[S2.size() - 1] == S3[0]) cout << "YES" << endl;
      |           ^
      |           S3
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";
  } else {
    cout << "NO";
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:53: error: expected primary-expression before '==' token
    6 |   if (A.at(A.size()-1)==B.at(0) && B.at(B.size()-1))==C.at(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";
  } else {
    cout << "NO";
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:53: error: expected primary-expression before '=' token
    6 |   if (A.at(A.size()-1)==B.at(0) && B.at(B.size()-1))=C.at(0)){
      |                                                     ^
Language: C++

#include <bits/stdc++.h>
#include <stdio.h>
#include <numeric>
using namespace std;
#define rep(i,n) for(int i=0;i<(int)(n);++i)
#define repone(i,n) for(int i=1;i<(int)(n);++i)
#define repo(i,o,n) for(int i=o;i<(int)(n);++i)
#define Rep(j,n) for(int j=0;j<(int)(n);++j)
#define Repo(j,o,n) for(int j=o;j<(int)(n);++j)
#define Repone(j,n) for(int j=1;j<(int)(n);++j)
#define all(v) (v).begin(),(v).end()
#define rall(v) (v).rbegin(),(v).rend()
#define int long long
#define pb(a) push_back(a)
#define eraser(v,i) (v).erase(v.begin()+(i))
#define pbpair(a,b) push_back(make_pair(a,b))
#define MOD 1000000007
#define INF 9223372036854775807
#define pairint pair<int,int>
int num[12] = {31,28,31,30,31,30,31,31,30,31,30,31};
bool uru(int checkyear){if(checkyear%4==0){if(checkyear%100!=0||checkyear%400==0)return true;}return false;}
int gcd( int x, int y ){return y ? gcd(y, x%y) : x;}
signed main() {
    int x=0,y=0,z=0,w=0,n=0,m=0;
    string s,d,f;
cin>>s>>d>>f;
if(s[s.size()-1]==d[0]&&d[size()-1]==f[0])cout << "YES";
    else cout<< "NO";
}


Compiler output:
a.cc: In function 'int main()':
a.cc:27:31: error: no matching function for call to 'size()'
   27 | if(s[s.size()-1]==d[0]&&d[size()-1]==f[0])cout << "YES";
      |                           ~~~~^~
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++

#include<iostream>
#include<iomanip>
#include<string>
#include<set>
#include<vector>
#include<utility>
#include<queue>
#include<algorithm>
#include<functional>
using namespace std;
#define LL long long
#define MOD 100000
#define inf 1999999999
typedef string St;

char stb(char c) { return 'A' + (c - 'a'); }

int main() {
	St a, b, c;
	cin >> a >> b >> c;
	cout << ((a.back == b[0] && b.back == c[0]) ? (St)"YES" : (St)"NO") << endl;

	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:21:26: 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=='
   21 |         cout << ((a.back == b[0] && b.back == c[0]) ? (St)"YES" : (St)"NO") << endl;
a.cc:21:44: 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=='
   21 |         cout << ((a.back == b[0] && b.back == c[0]) ? (St)"YES" : (St)"NO") << endl;
Language: C++

#include<bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i=0;i<n;i++)
int main(){
  string a,b,c; cin>>a>>b>>c;

  if(a[(a.length - 1)]==b[0]){
   if(b[(b.length - 1)]==c[0]) cout<<"YES"<<endl;}
  else cout<<"NO"<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:11: 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 '()' ?)
    7 |   if(a[(a.length - 1)]==b[0]){
      |         ~~^~~~~~
      |                 ()
a.cc:8:12: 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 '()' ?)
    8 |    if(b[(b.length - 1)]==c[0]) cout<<"YES"<<endl;}
      |          ~~^~~~~~
      |                  ()
Language: C++

#include<bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i=0;i<n;i++)
int main(){
  string a,b,c; cin>>a>>b>>c;

  if(a[a.length - 1]==b[0]){
   if(b[b.length - 1]==c[0]) cout<<"YES"<<endl;}
  else cout<<"NO"<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:10: 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 '()' ?)
    7 |   if(a[a.length - 1]==b[0]){
      |        ~~^~~~~~
      |                ()
a.cc:8:11: 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 '()' ?)
    8 |    if(b[b.length - 1]==c[0]) cout<<"YES"<<endl;}
      |         ~~^~~~~~
      |                 ()
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:6:68: error: expected ')' before '{' token
    6 |   if(A.at(A.size() - 1) == B.at(0) && B.at(B.size() - 1 == C.at(0)) {
      |     ~                                                              ^~
      |                                                                    )
a.cc:11:1: error: expected primary-expression before '}' token
   11 | }
      | ^
Language: C++

// #include <bits/stdc++.h>

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:6:5: error: 'string' was not declared in this scope
    6 |     string A, B, C;
      |     ^~~~~~
a.cc:1:1: note: 'std::string' is defined in header '<string>'; this is probably fixable by adding '#include <string>'
  +++ |+#include <string>
    1 | // #include <bits/stdc++.h>
a.cc:7:5: error: 'cin' was not declared in this scope
    7 |     cin >> A >> B >> C;
      |     ^~~
a.cc:1:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
  +++ |+#include <iostream>
    1 | // #include <bits/stdc++.h>
a.cc:7:12: error: 'A' was not declared in this scope
    7 |     cin >> A >> B >> C;
      |            ^
a.cc:7:17: error: 'B' was not declared in this scope
    7 |     cin >> A >> B >> C;
      |                 ^
a.cc:7:22: error: 'C' was not declared in this scope
    7 |     cin >> A >> B >> C;
      |                      ^
a.cc:10:9: error: 'cout' was not declared in this scope
   10 |         cout << "YES" <<endl;
      |         ^~~~
a.cc:10:9: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:10:25: error: 'endl' was not declared in this scope
   10 |         cout << "YES" <<endl;
      |                         ^~~~
a.cc:1:1: note: 'std::endl' is defined in header '<ostream>'; this is probably fixable by adding '#include <ostream>'
  +++ |+#include <ostream>
    1 | // #include <bits/stdc++.h>
a.cc:13:9: error: 'cout' was not declared in this scope
   13 |         cout << "NO" << endl;
      |         ^~~~
a.cc:13:9: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:13:25: error: 'endl' was not declared in this scope
   13 |         cout << "NO" << endl;
      |                         ^~~~
a.cc:13:25: note: 'std::endl' is defined in header '<ostream>'; this is probably fixable by adding '#include <ostream>'
Language: C++

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

    char a = a[0];
    char b = b[0];
    char c = c[0];

    if (a[i] == b[0] && b[j] == c[0]){
        cout << "YES" << endl;
    }
    else {
        cout << "NO" << endl;
    }
    
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:13: error: 'length' was not declared in this scope
    7 |     int i = length(A);
      |             ^~~~~~
a.cc:11:15: error: invalid types 'char[int]' for array subscript
   11 |     char a = a[0];
      |               ^
a.cc:12:15: error: invalid types 'char[int]' for array subscript
   12 |     char b = b[0];
      |               ^
a.cc:13:15: error: invalid types 'char[int]' for array subscript
   13 |     char c = c[0];
      |               ^
a.cc:15:10: error: invalid types 'char[int]' for array subscript
   15 |     if (a[i] == b[0] && b[j] == c[0]){
      |          ^
a.cc:15:18: error: invalid types 'char[int]' for array subscript
   15 |     if (a[i] == b[0] && b[j] == c[0]){
      |                  ^
a.cc:15:26: error: invalid types 'char[int]' for array subscript
   15 |     if (a[i] == b[0] && b[j] == c[0]){
      |                          ^
a.cc:15:34: error: invalid types 'char[int]' for array subscript
   15 |     if (a[i] == b[0] && b[j] == c[0]){
      |                                  ^
Language: C++

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

    char a = a[0];
    char b = b[0];
    char c = c[0];

    if (a[i] == b[0] && b[j] == c[0]){
        cout << "YES" << endl;
    }
    else {
        cout << "NO" << endl;
    }
    
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:13: error: 'len' was not declared in this scope
    7 |     int i = len(A);
      |             ^~~
a.cc:11:15: error: invalid types 'char[int]' for array subscript
   11 |     char a = a[0];
      |               ^
a.cc:12:15: error: invalid types 'char[int]' for array subscript
   12 |     char b = b[0];
      |               ^
a.cc:13:15: error: invalid types 'char[int]' for array subscript
   13 |     char c = c[0];
      |               ^
a.cc:15:10: error: invalid types 'char[int]' for array subscript
   15 |     if (a[i] == b[0] && b[j] == c[0]){
      |          ^
a.cc:15:18: error: invalid types 'char[int]' for array subscript
   15 |     if (a[i] == b[0] && b[j] == c[0]){
      |                  ^
a.cc:15:26: error: invalid types 'char[int]' for array subscript
   15 |     if (a[i] == b[0] && b[j] == c[0]){
      |                          ^
a.cc:15:34: error: invalid types 'char[int]' for array subscript
   15 |     if (a[i] == b[0] && b[j] == c[0]){
      |                                  ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){

  string s,t,u;
  cin>>s>>t>>u;
  if(s[s.size()-1]==t[0]&&t[t.size()-1]==u[0]){
    cout<<"YES<<endl;
  }
  else{
	cout<<"NO"<<endl;
  }
}


Compiler output:
a.cc:8:11: warning: missing terminating " character
    8 |     cout<<"YES<<endl;
      |           ^
a.cc:8:11: error: missing terminating " character
    8 |     cout<<"YES<<endl;
      |           ^~~~~~~~~~~
a.cc: In function 'int main()':
a.cc:9:3: error: expected primary-expression before '}' token
    9 |   }
      |   ^
Language: C++

#include <bits/stdc++.h>
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:7:10: 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 '()' ?)
    7 |   if(a[a.length-1]==b[0] && b[b.length-1]==c[0])cout<<"Yes"<<endl;
      |        ~~^~~~~~
      |                ()
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>::length() 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.length-1]==b[0] && b[b.length-1]==c[0])cout<<"Yes"<<endl;
      |                               ~~^~~~~~
      |                                       ()
Language: C++

#include <iostream>
#include <cstdlib>
#include <algorithm>
#include <vector>
#include <string>
#include <cmath>
#include <cassert>
#include <functional>
#include <string>
#include <sstream>
using namespace std;


int main(){
  int A, B, C; cin >> A >> B >> C;
  string ans = "YES";
  if(A.back() != B.front()) ans = "NO";
  if(B.back() != C.front()) ans = "NO";
  cout << ans << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:17:8: error: request for member 'back' in 'A', which is of non-class type 'int'
   17 |   if(A.back() != B.front()) ans = "NO";
      |        ^~~~
a.cc:17:20: error: request for member 'front' in 'B', which is of non-class type 'int'
   17 |   if(A.back() != B.front()) ans = "NO";
      |                    ^~~~~
a.cc:18:8: error: request for member 'back' in 'B', which is of non-class type 'int'
   18 |   if(B.back() != C.front()) ans = "NO";
      |        ^~~~
a.cc:18:20: error: request for member 'front' in 'C', which is of non-class type 'int'
   18 |   if(B.back() != C.front()) ans = "NO";
      |                    ^~~~~
Language: C++

#include <iostream>
#include <string>
#include <vector>
#include <math.h>
#include <stdio.h>
#include <algorithm>
#include <utility>
#include <functional>
#define rep(i,n) for(int i=0;i<(n);i++)
#define psortsecond(A,N) sort(A,A+N,[](const pii &a, const pii &b){return a.second<b.second;});
#define psortfirst(A,N) sort(A,A+N,[](const pii &a, const pii &b){return a.first<b.first;});
#define All(x) (x).begin(),(x).end()
using namespace std;
using pii  = pair<int,int>;
long long gcd(long long a, long long b){return (b == 0 ? a : gcd(b, a%b));}
long long lcm(long long a, long long b){return a*b/gcd(a,b);}
typedef long long ll;
#define MOD 1000000007
#define EPS 10e-8

// int main() {
//     ll A[6];
//     rep(i,3){
//         cin >> A[i];
//     }
//     //sort(A,A+3);
//     cout << (A[2]>=A[0] && A[2]<=A[1] ? "Yes" : "No") << endl;
// }

int main(){
    char X[108],Y[108],Z[108];cin >> X >> Y >> Z;
    cout <<(X[strlen(X)-1]==Y[0] && Y[strlen(Y)-1]==Z[0] ? "YES" : "NO")<<endl;;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:32:15: error: 'strlen' was not declared in this scope
   32 |     cout <<(X[strlen(X)-1]==Y[0] && Y[strlen(Y)-1]==Z[0] ? "YES" : "NO")<<endl;;
      |               ^~~~~~
a.cc:9:1: note: 'strlen' is defined in header '<cstring>'; this is probably fixable by adding '#include <cstring>'
    8 | #include <functional>
  +++ |+#include <cstring>
    9 | #define rep(i,n) for(int i=0;i<(n);i++)
Language: C++

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

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

Compiler output:
a.cc: In function 'int main()':
a.cc:8:27: error: conversion from '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'} to non-scalar type 'std::string' {aka 'std::__cxx11::basic_string<char>'} requested
    8 |   string Al = A[A.size()-1];
      |                           ^
a.cc:9:18: error: conversion from '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'} to non-scalar type 'std::string' {aka 'std::__cxx11::basic_string<char>'} requested
    9 |   string Bf = B[0];
      |                  ^
a.cc:10:27: error: conversion from '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'} to non-scalar type 'std::string' {aka 'std::__cxx11::basic_string<char>'} requested
   10 |   string Bl = B[B.size()-1];
      |                           ^
a.cc:11:18: error: conversion from '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'} to non-scalar type 'std::string' {aka 'std::__cxx11::basic_string<char>'} requested
   11 |   string Cf = C[0];
      |                  ^
Language: C++

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

Compiler output:
a.cc: In function 'int main()':
a.cc:9:63: error: invalid operands of types 'const char [4]' and '<unresolved overloaded function type>' to binary 'operator<<'
    9 |         if(A[a - 1] == B[0] && B[b - 1] == C[0]) cout < "YES" << endl;
      |                                                         ~~~~~~^~~~~~~
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.at(b.size()-1) == c.at(0))
    cout << "YES" << endl;
  else
     cout << "NO" << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:70: error: expected ';' before 'cout'
    7 |   if(a.at(a.size()-1) == b.at(0) && b.at(b.at(b.size()-1) == c.at(0))
      |                                                                      ^
      |                                                                      ;
    8 |     cout << "YES" << endl;
      |     ~~~~                                                              
a.cc:9:3: error: expected primary-expression before 'else'
    9 |   else
      |   ^~~~
a.cc:8:27: error: expected ')' before 'else'
    8 |     cout << "YES" << endl;
      |                           ^
      |                           )
    9 |   else
      |   ~~~~                     
a.cc:7:5: note: to match this '('
    7 |   if(a.at(a.size()-1) == b.at(0) && b.at(b.at(b.size()-1) == c.at(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";
else
	cout<<"NO";
}

		

Compiler output:
a.cc: In function 'int main()':
a.cc:6:42: 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++

#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";
else
	cout<<"NO";
}

		

Compiler output:
a.cc: In function 'int main()':
a.cc:6:15: 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
a.cc:6:42: 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))
      |                                      ~~~~^~
/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++

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

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


Compiler output:
a.cc: In function 'int main()':
a.cc:11:13: error: 'YES' was not declared in this scope
   11 |     cout << YES << endl;
      |             ^~~
a.cc:14:13: error: 'NO' was not declared in this scope
   14 |     cout << NO << endl;
      |             ^~
Language: C++

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

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


Compiler output:
a.cc: In function 'int main()':
a.cc:10:48: error: expected ')' before '{' token
   10 |   if(a.at(aa) == b.at(0) && b.at(bb) == c.at(0){
      |     ~                                          ^
      |                                                )
a.cc:16:6: error: expected primary-expression before '}' token
   16 |      }
      |      ^
Language: C++

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

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


Compiler output:
a.cc: In function 'int main()':
a.cc:8:3: error: redeclaration of 'int aa'
    8 |   aa = a.size() -1;
      |   ^~
a.cc:7:7: note: 'int aa' previously declared here
    7 |   int aa,bb,
      |       ^~
a.cc:10:48: error: expected ')' before '{' token
   10 |   if(a.at(aa) == b.at(0) && b.at(bb) == c.at(0){
      |     ~                                          ^
      |                                                )
a.cc:16:6: error: expected primary-expression before '}' token
   16 |      }
      |      ^
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:10:9: error: expected primary-expression before ')' token
   10 |   else () {
      |         ^