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

#include <bits/stdc++.h>
using namespace std;
 
 
int main() {
  int N;
  cin >> N;
  int number_of_AB = 0;
  int number_of_end_A = 0;
  int number_of_start_B = 0;
  int number_both = 0;
  
  string temp;
  
  for (int i = 0; i < N; i++){
    cin >> temp;
    //cout << temp << endl;
    for(int j = 0; j < temp.size() -1; j++){
      if(temp.at(j) == 'A' && temp.at(j+1) == 'B'){
        number_of_AB ++;
      }
    }
    
    if(temp.at(0) == 'B' && temp.at(temp.size()-1) != 'A'){
        number_of_start_B ++;
      }
    if(temp.at(temp.size()-1) == 'A' && temp.at(0) != 'B'){
        number_of_end_A ++;
      }
    if(temp.at(temp.size()-1) == 'A' && temp.at(0) == 'B'){
        number_both ++;
      }
  }

  
  int diff
  if(number_of_start_B + number_both <= number_of_end_A){
    cout << (number_of_start_B + number_both) + number_of_AB << endl;
  }else if (number_of_end_A + number_both <= number_of_start_B){
    cout << (number_of_end_A + number_both) + number_of_AB << endl;
  }else if (number_of_end_A > number_of_start_B){
    diff = number_of_end_A - number_of_start_B; 
    cout << min ( (number_both-diff)/2 + number_of_end_A, (number_both+diff)/2 + number_of_start_B) + number_of_AB << endl
  }else if (number_of_end_A < number_of_start_B){
    diff = number_of_start_B - number_of_end_A;
    cout << min ( (number_both+diff)/2 + number_of_end_A, (number_both-diff)/2 + number_of_start_B) + number_of_AB << endl
  }
  }

 
}

Compiler output:
a.cc: In function 'int main()':
a.cc:37:3: error: expected initializer before 'if'
   37 |   if(number_of_start_B + number_both <= number_of_end_A){
      |   ^~
a.cc:39:4: error: 'else' without a previous 'if'
   39 |   }else if (number_of_end_A + number_both <= number_of_start_B){
      |    ^~~~
a.cc:42:5: error: 'diff' was not declared in this scope
   42 |     diff = number_of_end_A - number_of_start_B;
      |     ^~~~
a.cc:45:5: error: 'diff' was not declared in this scope
   45 |     diff = number_of_start_B - number_of_end_A;
      |     ^~~~
a.cc: At global scope:
a.cc:51:1: error: expected declaration before '}' token
   51 | }
      | ^
Language: C++

#include <bits/stdc++.h>

using namespace std;

#define REP(i, x, y) for (int i = x; i < y; i++)

const int8_t  INFC = 0x3f;
const int16_t INFS = 0x3f3f;
const int32_t INF  = 0x3f3f3f3f;
const int64_t INFL = 0x3f3f3f3f3f3f3f3fLL;

int usedA[12345],usedB[12345];
vector<int> A,B,BtoA(12345);
string s[12345];

int main()
{
    ios::sync_with_stdio(0);
    int n;
    cin >> n;
    int ans = 0;
    REP(k, 0, n)
    {
        //string s[k];
        cin >> s[k];
        for (int i = 0; i < s[k].size() - 1; i++)
        {
            if (s[k][i] == 'A' && s[k][i + 1] == 'B') ans++;
        }
        if (s[k].back()=='A') A.push_back(k);
        if (s[k].front()=='B') B.push_back(k);
        if (s[k].back()!='A'&&s[k].front()!='B') s[k]="ZZ";
        else s[k] = string()+(s[k].front()=='B'?'B':' ')+(s[k].back()=='A'?'A':'Z');
    }
    sort(s,s+n);
    REP(i,0,n)
    {
        //cout << s[i] << endl;
        REP(j,i+1,n)
        {
            if (usedB[j]==0&&s[i].back()=='A'&&s[j].front()=='B') ans++,usedB[j]=1,break;
        }
    }
    cout << ans << endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:41:84: error: expected primary-expression before 'break'
   41 |             if (usedB[j]==0&&s[i].back()=='A'&&s[j].front()=='B') ans++,usedB[j]=1,break;
      |                                                                                    ^~~~~
Language: C++

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

int main() {
    int N;
    cin >> N;
    vector<string>V(N);
    for(int i = 0; i < N; ++i) {
            cin >> V[i];
    }
    int a=0,b=0,ab=0;

    vector<int>C(N);
    int cnt = 0;
    for(i=0; i<N; i++){
        int flag = false;
        for(j=0; j<(V[i].length()); j++){
            if(V[i][j]=='B' && flag==true){
                cnt+=1;
                flag=false;
            }
            if(V[i][j]=='A'){
                flag=true;
            }else{
                flag=false;
            }
        }
        if(V[i][0]=='B' && V[i][V[i].length()-1]=='A'){
            ab+=1;
        }else if(V[i][0]=='B'){
            b+=1;
        }else if(V[i][V[i].length()-1]=='A'){
            a+=1;
        }

    }
    int result = 0;
    if(ab==0){
        if(a<b){
            result = a;
        }else{
            result = b;
        }
    }else{
        result = result + ab - 1;
        if(a==0 && b==0){

        }else if(a==1 && b==1){
            result += 2;
        }else if(a==1 || b==1){
            result += 1;
        }else{
            result += max((a-1),(b-1));
        }
    }
    result = result + cnt;
    if(result<0)result=0;

    cout << result <<endl;
} 

Compiler output:
a.cc: In function 'int main()':
a.cc:18:9: error: 'i' was not declared in this scope
   18 |     for(i=0; i<N; i++){
      |         ^
a.cc:20:13: error: 'j' was not declared in this scope
   20 |         for(j=0; j<(V[i].length()); j++){
      |             ^
Language: C++

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

int main(){
        int n=0;
        cin >> n;
        string tmp;
        int ba_num = 0;
        int last_a=0;
        int first_b=0;
        int ans = 0;
        for(int i=0;i<n;i++){
                cin >> tmp;
                ans += count(tmp.cbegin(), tmp.cend(), "ab");
                int len=(int)(tmp.length());
                if(bool first_is_b = (tmp[0] == 'b')) first_b++;
                if(bool last_is_a = (tmp[len-1] == 'a')) last_a++;
                if(fisrt_is_b | last_is_a) ba_num++;
        }
        ans += min(last_a, first_b);
        if(ba_num == n) ans--;
        cout << ans << endl;
        return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:24: error: 'count' was not declared in this scope
   15 |                 ans += count(tmp.cbegin(), tmp.cend(), "ab");
      |                        ^~~~~
a.cc:19:20: error: 'fisrt_is_b' was not declared in this scope; did you mean 'first_b'?
   19 |                 if(fisrt_is_b | last_is_a) ba_num++;
      |                    ^~~~~~~~~~
      |                    first_b
a.cc:19:33: error: 'last_is_a' was not declared in this scope; did you mean 'last_a'?
   19 |                 if(fisrt_is_b | last_is_a) ba_num++;
      |                                 ^~~~~~~~~
      |                                 last_a
Language: Java

import java.io.*;

public class Main{
  public static void main(String... args) throws IOException {
    BufferedReader stdin = new BufferedReader(new InputStreamReader(System.in));
    String line = stdin.readLine();
    String[] in = line.split(" ");
    int n = Integer.parseInt(in[0]);
    System.err.println(n);
    int beginB = 0;
    int endA = 0;
    int naka = 0;
	for (int i=0; i<n; i++) {
	    line = stdin.readLine();
      	if (line[0] == 'B') {
          beginB++;
        }
      	if (line[line.size()] == 'A') {
          endE++;
        }
        naka += line.replace("AB");
    }
    System.err.println(beginB);
    System.err.println(endA);
    System.err.println(naka);
    
    System.out.println(naka + Math.min(beginB, endA));
  }
}

Compiler output:
Main.java:15: error: array required, but String found
      	if (line[0] == 'B') {
      	        ^
Main.java:18: error: cannot find symbol
      	if (line[line.size()] == 'A') {
      	             ^
  symbol:   method size()
  location: variable line of type String
Main.java:18: error: array required, but String found
      	if (line[line.size()] == 'A') {
      	        ^
Main.java:19: error: cannot find symbol
          endE++;
          ^
  symbol:   variable endE
  location: class Main
Main.java:21: error: no suitable method found for replace(String)
        naka += line.replace("AB");
                    ^
    method String.replace(char,char) is not applicable
      (actual and formal argument lists differ in length)
    method String.replace(CharSequence,CharSequence) is not applicable
      (actual and formal argument lists differ in length)
5 errors
Language: C++

#include<stdio.h>
#include<iostream>
#include<vector>
#include<math.h>
#include<string>

typedef long long ll;
typedef unsigned short int unsi;
typedef unsigned int uni;
typedef unsigned long int unli;

using namespace std;

unsi gojoho(unsi A, unsi B) {
	unsi R = 1;
	if (A > B) {
		while (R != 0) {
			R = A % B;
			A = B;
			B = R;
		}
		return A;
	}
	else {
		while (R != 0) {
			R = B % A;
			B = A;
			A = R;
		}
		return B;
	}
}

uni gojoho(uni A, uni B) {
	uni R = 1;
	if (A > B) {
		while (R != 0) {
			R = A % B;
			A = B;
			B = R;
		}
		return A;
	}
	else {
		while (R != 0) {
			R = B % A;
			B = A;
			A = R;
		}
		return B;
	}
}

unli gojoho(unli A, unli B) {
	unli R = 1;
	if (A > B) {
		while (R != 0) {
			R = A % B;
			A = B;
			B = R;
		}
		return A;
	}
	else {
		while (R != 0) {
			R = B % A;
			B = A;
			A = R;
		}
		return B;
	}
}

int gojoho(int A, int B) {
	int R = 1;
	if (A > B) {
		while (R != 0) {
			R = A % B;
			A = B;
			B = R;
		}
		return A;
	}
	else {
		while (R != 0) {
			R = B % A;
			B = A;
			A = R;
		}
		return B;
	}
}



int main() {
	int N;
	int A_Back=0;
	int B_Head=0;
	int ABcount = 0;
	string s="";
	bool A_find = false;
	int Ans = 0;



	scanf_s("%d", &N);
	for (int i = 0; i <=N; i++){
		getline(cin, s);
		int l = s.size();
		for (int i = 0; i < l; i++){
			char c = s[i];
			if (c == 'A') {
				A_find = true;
				if (i == l - 1) {
					A_Back++;
				}
			}else if (c == 'B') {
				if (A_find) {
					ABcount++;
				}
				if (i == 0) {
					B_Head++;
				}
				A_find = false;
			}else {
				A_find = false;
			}
		}
	}
	
	Ans = ABcount + fmin(A_Back, B_Head);
	printf("%d", Ans);
	return(0);
}






Compiler output:
a.cc: In function 'int main()':
a.cc:107:9: error: 'scanf_s' was not declared in this scope; did you mean 'scanf'?
  107 |         scanf_s("%d", &N);
      |         ^~~~~~~
      |         scanf
Language: C++

def getN():
    return int(input())
def getNM():
    return map(int, input().split())
def getList():
    return list(map(int, input().split()))
from collections import Counter

n = getN()
enda = 0
begb = 0
ab = 0
both = 0
for i in range(n):
    s = input()
    if s.startswith("B"):
        enda += 1
    if s.endswith("A"):
        begb += 1
    if s.startswith("B") and s.endswith("A"):
        both += 1
    for a, b in zip(s, s[1:]):
        if a == "A" and b == "B":
            ab += 1

ans = ab + min(enda,begb)
dec = 0
if max(enda, begb) == both and both != 0:
    dec = 1

print(ans-dec)


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

#include <iostream>
#include <cmath>
#include <vector>
#include <map>
#include <stack>
#include <queue>
#include <set>
#include <algorithm>
#include <iomanip>
#include <string.h>

#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define REP(i,n)  FOR(i,0,n)
#define ALL(a)  (a).begin(),(a).end()
#include <iostream>
#include <cmath>
#include <vector>
#include <map>
#include <stack>
#include <queue>
#include <set>
#include <algorithm>
#include <iomanip>
#include <string.h>

#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define REP(i,n)  FOR(i,0,n)
#define ALL(a)  (a).begin(),(a).end()

typedef long long lint;

using namespace std;

int main(){
  int N;
  cin>>N;
  int A=0;
  int B=0;
  int AB=0;
  int ans=0;
  REP(i,N){
    string S;
    cin>>S;
    REP(j,S.size()-1){
      if(S[j]=='A' and S[j+1]=='B')ans++;
    }
    if(S[0]=='B' and S[S.size()-1]=='A'){
      AB++;
      continue;
    }
    if(S[0]=='B')B++;
    if(S[S.size()-1]=='A')A++;
  }
  cerr<<A<<' '<<B<<' '<<AB<<endl;
  if(AB!=0){
    ans+=AB-1;
    if(A==0 and B==0){
      cout<<ans<<endl;
      return 0;
    }
    A++;
    B++;
  }
  ans+=min(A,B);
  cout<<ans<<endl;
  return 0;
}

typedef long long lint;

using namespace std;

int main(){
  int N;
  cin>>N;
  int A=0;
  int B=0;
  int AB=0;
  int ans=0;
  REP(i,N){
    string S;
    cin>>S;
    REP(j,S.size()-1){
      if(S[j]=='A' and S[j+1]=='B')ans++;
    }
    if(S[0]=='B' and S[S.size()-1]=='A'){
      AB++;
      continue;
    }
    if(S[0]=='B')B++;
    if(S[S.size()-1]=='A')A++;
  }
  cerr<<A<<' '<<B<<' '<<AB<<endl;
  if(AB==N){
    cout<<N-1<<endl;
    return 0;
  }
  if(AB!=0){
    ans+=AB-1;
    A++;
    B++;
  }
  ans+=min(A,B);
  cout<<ans<<endl;
  return 0;
}


Compiler output:
a.cc:73:5: error: redefinition of 'int main()'
   73 | int main(){
      |     ^~~~
a.cc:34:5: note: 'int main()' previously defined here
   34 | int main(){
      |     ^~~~
Language: C

#include<stdio.h>

int main() {
	int i, j, k, n, t, m, b, h, w, r, g;
	long long int ab = 0, a1 = 0, b1 = 0;
	char s[15];
	long long int f = 0;
	h = 0;

	scanf("%d", &n);
	for (i = 0;i < n;i++) {
		scanf("%s", s);
		if (s[0] == 'B') {
			b1++;
		}
		for (j = 0;j < 12;j++) {
			if (s[j] == 'A') {
				if (s[j + 1] == 'B') {
					ab++;
				}
				else if (s[j + 1] == '\0') {
					a1++;
					break;
				}
			}
			else if (s[j] == '\0');
				break;
			}
		}
	}
	
	if (a1 < b1) {
		f = ab + a1;
	}
	else if(a1 > b1){
		f = ab + b1;
	}
	else if (a1 == b1) {
		if (a1 == n) {
			f = ab + a1 - 1;
		}
		else {
			f = ab + a1;
		}
	}

	printf("%lld",f);


	return 0;
}

Compiler output:
main.c:32:9: error: expected identifier or '(' before 'if'
   32 |         if (a1 < b1) {
      |         ^~
main.c:35:9: error: expected identifier or '(' before 'else'
   35 |         else if(a1 > b1){
      |         ^~~~
main.c:38:9: error: expected identifier or '(' before 'else'
   38 |         else if (a1 == b1) {
      |         ^~~~
main.c:47:16: error: expected declaration specifiers or '...' before string constant
   47 |         printf("%lld",f);
      |                ^~~~~~
main.c:47:23: error: unknown type name 'f'
   47 |         printf("%lld",f);
      |                       ^
main.c:50:9: error: expected identifier or '(' before 'return'
   50 |         return 0;
      |         ^~~~~~
main.c:51:1: error: expected identifier or '(' before '}' token
   51 | }
      | ^
Language: C++

#include<stdio.h>
#include<iostream>
#include<vector>
#include<math.h>
#include<string>

typedef long long ll;
typedef unsigned short int unsi;
typedef unsigned int uni;
typedef unsigned long int unli;

using namespace std;

unsi gojoho(unsi A, unsi B) {
	unsi R = 1;
	if (A > B) {
		while (R != 0) {
			R = A % B;
			A = B;
			B = R;
		}
		return A;
	}
	else {
		while (R != 0) {
			R = B % A;
			B = A;
			A = R;
		}
		return B;
	}
}

uni gojoho(uni A, uni B) {
	uni R = 1;
	if (A > B) {
		while (R != 0) {
			R = A % B;
			A = B;
			B = R;
		}
		return A;
	}
	else {
		while (R != 0) {
			R = B % A;
			B = A;
			A = R;
		}
		return B;
	}
}

unli gojoho(unli A, unli B) {
	unli R = 1;
	if (A > B) {
		while (R != 0) {
			R = A % B;
			A = B;
			B = R;
		}
		return A;
	}
	else {
		while (R != 0) {
			R = B % A;
			B = A;
			A = R;
		}
		return B;
	}
}

int gojoho(int A, int B) {
	int R = 1;
	if (A > B) {
		while (R != 0) {
			R = A % B;
			A = B;
			B = R;
		}
		return A;
	}
	else {
		while (R != 0) {
			R = B % A;
			B = A;
			A = R;
		}
		return B;
	}
}



int main() {
	int N;
	int A_Back=0;
	int B_Head=0;
	int ABcount = 0;
	string s="";
	bool A_find = false;
	int Ans = 0;



	scanf_s("%d", &N);
	for (int i = 0; i <=N; i++){
		getline(cin, s);
		int l = s.size();
		for (int i = 0; i < l; i++){
			char c = s[i];
			if (c == 'A') {
				A_find = true;
				if (i == l - 1) {
					A_Back++;
				}
			}else if (c == 'B') {
				if (A_find) {
					ABcount++;
				}
				if (i == 0) {
					B_Head++;
				}
				A_find = false;
			}else {
				A_find = false;
			}
		}
	}
	
	Ans = ABcount + fmin(A_Back, B_Head);
	return(0);
}

Compiler output:
a.cc: In function 'int main()':
a.cc:107:9: error: 'scanf_s' was not declared in this scope; did you mean 'scanf'?
  107 |         scanf_s("%d", &N);
      |         ^~~~~~~
      |         scanf
Language: C++

#include <iostream>
#include <algorithm>

using namespace std ;



int eachAB (char *s){
    int count=0;
    int n = strlen(s);
    for(int i=0;i<n-1;i++){
        if((s[i]=='A') && (s[i+1]=='B')){
            count++;
        };
    }
    return count;
}

int tailA(char *s){
    int n=strlen(s);
    return s[n]=='A';
}

int headB(char *s){
    return s[0]=='B';
}

int main(){;
    int N;
    int each=0;
    int tail=0;
    int head=0;
    scanf("%d",&N);
    for (int i=0;i<N;i++){
        char s[10];
        scanf("%s",s);
        each += eachAB(s);
        tail += tailA(s);
        head += headB(s);
    }
    int ans = each+max(tail,head);
    printf("%d",ans);
    return 0;
}

Compiler output:
a.cc: In function 'int eachAB(char*)':
a.cc:10:13: error: 'strlen' was not declared in this scope
   10 |     int n = strlen(s);
      |             ^~~~~~
a.cc:3:1: note: 'strlen' is defined in header '<cstring>'; this is probably fixable by adding '#include <cstring>'
    2 | #include <algorithm>
  +++ |+#include <cstring>
    3 | 
a.cc: In function 'int tailA(char*)':
a.cc:20:11: error: 'strlen' was not declared in this scope
   20 |     int n=strlen(s);
      |           ^~~~~~
a.cc:20:11: note: 'strlen' is defined in header '<cstring>'; this is probably fixable by adding '#include <cstring>'
Language: C++

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

#define int long long
#define rep(x,y) for(int i=x;i<y;i++)
#define REP(x,y) for(int j=x;j<y;j++)
#define str string
#define vint vector<int>
#define vchar vector<char>
#define vool vector<bool>
#define pb() pushback
#define elif else if
#define all(x) x.begin(),x.end()

void call(int);
main(){
    int N,b,count=0,count2=0,H=0,W=0;
    double r;
    int C='A'-'a';
    char op;
    str S,T;
    cin>>N;
    vector<string> v(N);
    rep(0,N){
      cin>>v.at(i);
    }
    rep(0,N){
      if(v.at(i).at(0)=='B'&&v.at(i).at(v.at(i).size()-1)=='A')W+=1;
      elif(v.at(i).at(0)=='B')count2+=1;
      elif(v.at(i).at(v.at(i).size()-1)=='A')H+=1;
      REP(0,v[i].size()-1){
        if(v.at(i).at(j)=='A'&&v.at(i).at(j+1)=='B')count+=1;
      }
    }
    cout<<count+max(count2,H)+(W-abs(H-count2))-1+<<endl;
}


Compiler output:
a.cc:16:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   16 | main(){
      | ^~~~
a.cc: In function 'int main()':
a.cc:35:51: error: expected primary-expression before '<<' token
   35 |     cout<<count+max(count2,H)+(W-abs(H-count2))-1+<<endl;
      |                                                   ^~
Language: C++

import re
aflag = 0
bflag = 0
cnt = 0
N = int(input())
for i in range(N):
    s = input()
    if s[-1:] == "A":
        aflag += 1
    if s[:1] == "B":
        bflag += 1
    if re.search("AB", s):
        cnt += 1
    if re.search("AB.*AB", s):
        cnt += 1
    if re.search("AB.*AB.*AB", s):
        cnt += 1
    if re.search("AB.*AB.*AB.*AB", s):
        cnt += 1
    if re.search("AB.*AB.*AB.*AB.*AB", s):
        cnt += 1

cnt += min(aflag, bflag)
print(cnt)

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

#include <iostream>
#include <algorithm>

using namespace std ;



int eachAB (char *s){
    int count=0;
    int n = strlen(s);
    for(int i=0;i<n-1;i++){
        if((s[i]=='A') && (s[i+1]=='B')){
            count++;
        };
    }
    return count;
}

int tailA(char *s){
    int n=strlen(s);
    return s[n]=='A';
}

int headB(char *s){
    return s[0]=='B';
}

int main(){;
    int N;
    int each=0;
    int tail=0;
    int head=0;
    scanf("%d",N);
    for (int i=0;i<N;i++){
        char s[10];
        scanf("%s",s);
        each += eachAB(s);
        tail += tailA(s);
        head += headB(s);
    }
    int ans = each+max(tail,head);
    printf("%d",ans);
    return 0;
}

Compiler output:
a.cc: In function 'int eachAB(char*)':
a.cc:10:13: error: 'strlen' was not declared in this scope
   10 |     int n = strlen(s);
      |             ^~~~~~
a.cc:3:1: note: 'strlen' is defined in header '<cstring>'; this is probably fixable by adding '#include <cstring>'
    2 | #include <algorithm>
  +++ |+#include <cstring>
    3 | 
a.cc: In function 'int tailA(char*)':
a.cc:20:11: error: 'strlen' was not declared in this scope
   20 |     int n=strlen(s);
      |           ^~~~~~
a.cc:20:11: note: 'strlen' is defined in header '<cstring>'; this is probably fixable by adding '#include <cstring>'
Language: C++


    std::string s;
    int a =0;
    int b =0;
    int x =0;
    int p =0;
    for (int i = 0; i < N; i++)
    {
        cin >> s;
        int ssize = s.length();
        if (s.at(0)=='B')
        b++;
        if (s.at(ssize-1) == 'A')
        a++;
        if (s.at(0)=='B' && s.at(ssize-1) == 'A')
        p++;

        for (int j = 0; j < ssize - 1 ; j++)
        {
        if (s.at(j)=='A' && s.at(j+1)=='B')
        x++;
        }
    }
    int m = min(a,b);
    if (m == N || (p > 0 && a == b))
    m = m-1;
    int ans = x + m;
    cout << ans << endl;

Compiler output:
a.cc:2:10: error: 'string' in namespace 'std' does not name a type
    2 |     std::string s;
      |          ^~~~~~
a.cc:1:1: note: 'std::string' is defined in header '<string>'; this is probably fixable by adding '#include <string>'
  +++ |+#include <string>
    1 | 
a.cc:7:5: error: expected unqualified-id before 'for'
    7 |     for (int i = 0; i < N; i++)
      |     ^~~
a.cc:7:21: error: 'i' does not name a type
    7 |     for (int i = 0; i < N; i++)
      |                     ^
a.cc:7:28: error: 'i' does not name a type
    7 |     for (int i = 0; i < N; i++)
      |                            ^
a.cc:24:13: error: 'min' was not declared in this scope
   24 |     int m = min(a,b);
      |             ^~~
a.cc:25:5: error: expected unqualified-id before 'if'
   25 |     if (m == N || (p > 0 && a == b))
      |     ^~
a.cc:28:5: error: 'cout' does not name a type
   28 |     cout << ans << endl;
      |     ^~~~
Language: C++

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

int main(){
  int N;
  cin >> N;

  vector<string> s;
  for(int i = 0;i<N;i++){
    string si;
    cin >> si;
    s.push_back(si);
  }
  int count= 0;
  int countBA= 0;
  int countB = 0;
  int countA = 0;
  for(string e:s){
    for(int i=0; i<e.size() -2; i++){
      if(e[i] == 'A' && e[i+1] == 'B') count++;
    }
    if(e[0] == 'B' && e[e.size() -1] == 'A'){
      countBA++1;
    }else if(e[0] == 'B'){
      countB++1;
    }else if(e[e.size() -1] == 'A'){
      countA++;
    }
  }
  if(countBA > 0){
    count += countBA-1;
    countB++;
    countA++;
  }
  
  cout << count + min(countB,countA) << endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:25:16: error: expected ';' before numeric constant
   25 |       countBA++1;
      |                ^
      |                ;
a.cc:27:15: error: expected ';' before numeric constant
   27 |       countB++1;
      |               ^
      |               ;
Language: C++

#include<iostream>
#include<cmath>
#include<numeric>
#include<string>
#include<algorithm>
#include<vector>
#include<map>
#define rep(i,n) for(int i=0;i<n;i++)
#define rep1(i,n) for(int i=1;i<n;i++)
#define int64 long long
#define modbig (10*10*10*10*10*10*10*10*10+7)
using namespace std;

int main(){
  int n;
  cin>>n;
  string s[n];
  rep(i,n){
    cin>>s[i];
  }
  int ab=0,enda=0,startb=0,both=0;
  rep(i,n){
    rep(j,s[i].length()-1){
      if(s[i].substr(j,2)=="AB"){
        ab++;
      }
    }
    if(s[i][0]=='B'){
      startb++;
    }
    if(s[i][s[i].length()-1]=='A'){
      enda++;
    }
    if(s[i][0]=='B' && s[i].[s[i].length()-1]=='A'){
      startb--; enda--; both++;
  }
  if(startb==0 && enda==0 && both!=0){
    cout<<ab+both-1;
  }else{
    cout<<ab+min(enda,startb)+both;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:34:29: error: expected unqualified-id before '[' token
   34 |     if(s[i][0]=='B' && s[i].[s[i].length()-1]=='A'){
      |                             ^
a.cc:41:2: error: expected '}' at end of input
   41 | }
      |  ^
a.cc:22:11: note: to match this '{'
   22 |   rep(i,n){
      |           ^
a.cc:41:2: error: expected '}' at end of input
   41 | }
      |  ^
a.cc:14:11: note: to match this '{'
   14 | int main(){
      |           ^
Language: C++

#!/usr/bin/python3

n = int(input())

cnt=0
cnt_a=0
cnt_b=0
cnt_d=0

for i in range(n):
    s=input()
    cnt += s.count("AB")
    if s[-1]=='A':
        cnt_a+=1
    if s[0]=='B':
        cnt_b+=1
    if s[-1]=='A' and s[0]=='B':
        cnt_d+=1

cnt += min(cnt_a,cnt_b)
if cnt_d == min(cnt_a,cnt_b):
    cnt-=1

print(cnt)


Compiler output:
a.cc:1:2: error: invalid preprocessing directive #!
    1 | #!/usr/bin/python3
      |  ^
a.cc:3:1: error: 'n' does not name a type
    3 | n = int(input())
      | ^
Language: Java

import java.util.*;
public class Main{
	public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int cnt = 0;
        int acnt = 0;
        int bcnt = 0;
        boolean flag = false;
        int m = 0;
        for(int i = 0; i<n; i++){
            String s = sc.next();
            for(int j = 0; j<s.length()-1; j++){
                if(s.charAt(j) == 'A'){
                    if(s.charAt(j+1)=='B') cnt++;
                }
            }
            if(s.charAt(0)=='B') bcnt++;
            if(s.charAt(s.length()-1)=='A') acnt++;
            }
        }
        int add = Math.min(acnt , bcnt);
        if(add==n) add--;
        System.out.println(cnt + add);
    }
}


Compiler output:
Main.java:23: error: illegal start of type
        if(add==n) add--;
        ^
Main.java:23: error: <identifier> expected
        if(add==n) add--;
              ^
Main.java:23: error: <identifier> expected
        if(add==n) add--;
                 ^
Main.java:23: error: <identifier> expected
        if(add==n) add--;
                      ^
Main.java:24: error: <identifier> expected
        System.out.println(cnt + add);
                          ^
Main.java:24: error: <identifier> expected
        System.out.println(cnt + add);
                              ^
Main.java:26: error: class, interface, enum, or record expected
}
^
7 errors
Language: Java

import java.util.*;

class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int n = Integer.parseInt(sc.next());
    int a = 0;
    int b = 0;
    int ab = 0;
    int l = 0;
    int flg = 0;
    int ans = 0;
    
    for (int i=0; i<n; i++) {
	  String s = sc.next();
      l = s.length();
      if (s.substring(0,1).equals("B")) {
        b++;
      }
      if (s.substring(l-1,l).equals("A")) {
        a++;
      }
      if ( ((!s.substring(0,1).equals("B")) && (s.substring(l-1,l).equals("A")))
           || ((s.substring(0,1).equals("B")) && (!s.substring(l-1,l).equals("A"))) ) {
        flg = 1;
      }
      for (int j=0; j<l-1; j++) {
	    if (s.substring(j, j+2).equals("AB")) {
          ab++;
        }
      }
    }
   
    if (a == b && flg == 0) {
	  ans = ab + a - 1;
    } (a == b && flg == 1) {
	  ans = ab + a;
    } else {
      ans = ab + Math.min(a,b);
    }
    
    System.out.println(ans);
  }
}


Compiler output:
Main.java:36: error: not a statement
    } (a == b && flg == 1) {
      ^
Main.java:36: error: ';' expected
    } (a == b && flg == 1) {
                          ^
Main.java:38: error: 'else' without 'if'
    } else {
      ^
3 errors
Language: C++

n = int(input())
s = [input() for _ in range(n)]

counter = 0
begin_b = []
end_a = []
begin_b_and_end_a = []
for i in range(n):
    counter += s[i].count('AB')
    if s[i][0] == 'B':
        begin_b.append(i)
    if s[i][-1] == 'A':
        end_a.append(i)
    if s[i][0] == 'B' and s[i][-1] == 'A':
        begin_b_and_end_a.append(i)

if len(begin_b) == len(begin_b_and_end_a) and len(begin_b_and_end_a) == len(end_a) and len(end_a) > 0:
    print(counter + min(len(begin_b), len(end_a)) - 1)
else:
    print(counter + min(len(begin_b), len(end_a)))


Compiler output:
a.cc:9:27: warning: multi-character character constant [-Wmultichar]
    9 |     counter += s[i].count('AB')
      |                           ^~~~
a.cc:1:1: error: 'n' does not name a type
    1 | n = int(input())
      | ^
Language: C++

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

int main(){
    int n,ans=0,na=0,nb=0,c=1;
    string temp;
    cin>>n;
    for(int i=0;i<n;i++){
        cin>>temp;
        if(temp.front()=='B'){
            nb++;
            if(temp.back()!='A'){c=0;}
        }
        if(temp.back()=='A'){na++;}
        for(int j=0;j<temp.size()-1;j++){
            if(temp[j]=='A'){
                if(temp[j+1]=='B'){ans++;}
            }
        }
    }
    if(na==nb && c=1){ans+=min(na,nb)-1;}
    else{ans+=min(na,nb);}
    cout<<ans<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:21:15: error: lvalue required as left operand of assignment
   21 |     if(na==nb && c=1){ans+=min(na,nb)-1;}
      |        ~~~~~~~^~~~
Language: C++

#define _USE_MATH_DEFINES
#include<bits/stdc++.h>
#define int long long
#define rep(i,n) for(int i=0;i<n;i++)
#define Rep(i,a,b) for(int i=0;i<b;i++)
#define REP(i,a,b) for(int i=0;i<=b;i++)
#define rev(i,n) for(int i=n-1;i>=0;i--)
#define vi vector<int>
#define vvi vector<vi>
#define pb push_back
#define pi pair<int,int>
#define vp vector<pair<int,int>>
#define mp make_pair
#define all(v) (v).begin(),(v).end()
#define fi first
#define se second
#define MEMSET(a) memset(a,0,sizeof(a))
#define inf (1ll<<60)
#define Yes(f) cout <<(f?"Yes":"No")<<endl//fが真の場合Yesを出力、偽の場合Noを出力
#define yes(f) cout <<(f?"yes":"no")<<endl
#define YES(f) cout <<(f?"YES":"NO")<<endl
#define SORT(v) sort(all(v))
#define RSORT(v) sort(all(v),greater<int>())

using namespace std;

const int mod=1e9+7;

signed main(){
    int n;
    cin >> n;
    vector<string> s(n);

    int ans=0;
    rep(i,n)
    {
        cin >> s[i];
        rep(j,s[i].size()-1)
        {
            if(s[i][j]=='A'&&s[i][j+1]=='B')ans++;
        }
    }

    int lasta,fib;
    lasta=fib=0;
    int doublecount=0;
    int a=0;
    rep(i,n)
    {
        if(s[i][s.size()-1]=='A')
        {
            lasta++;
            a++;
        }
        if(s[i][0]=='B')
        {
        fib++;
        a++;
        }
        if(a==2)doublecount++;
        a=0;
    }
     if(lasta==fib&&lasta=doublecount)ans+=doublecount-1;
     ans+=min(lasta,fib);

    cout << ans << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:63:19: error: lvalue required as left operand of assignment
   63 |      if(lasta==fib&&lasta=doublecount)ans+=doublecount-1;
      |         ~~~~~~~~~~^~~~~~~
Language: C++

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

int main()
{
  int n;
  cin >> n;
  int answer = 0;
  int a_remain = 0;
  int b_remain = 0;

  for (int i=0; i<n; i++){
    char strings[12];
    cin >> strings;
    int a_count = 0;
    int b_count = 0;
    for (int j=0; strings[j] != ''\0'; j++) {
      if (strings[j] == 'A') {
        a_count++;
      } else if (strings[i] == 'B') {
        b_count++;
      }
    }
    if (a_count < b_count) {
      answer += a_count;
      b_remain++;
    } else if (b_count < a_count) {
      answer += b_count;
      a_remain++;
    } else {
      answer += a_count;
    }
  }
  if (a_remain <= b_remain) {
    answer += a_remain;
  } else {
    answer += b_remain;
  }
  cout << answer << endl;
}

Compiler output:
a.cc:17:33: error: empty character constant
   17 |     for (int j=0; strings[j] != ''\0'; j++) {
      |                                 ^~
a.cc:17:35: error: stray '\' in program
   17 |     for (int j=0; strings[j] != ''\0'; j++) {
      |                                   ^
a.cc:17:37: warning: missing terminating ' character
   17 |     for (int j=0; strings[j] != ''\0'; j++) {
      |                                     ^
a.cc:17:37: error: missing terminating ' character
   17 |     for (int j=0; strings[j] != ''\0'; j++) {
      |                                     ^~~~~~~~~
a.cc: In function 'int main()':
a.cc:17:35: error: expected ';' before numeric constant
   17 |     for (int j=0; strings[j] != ''\0'; j++) {
      |                                   ^~
      |                                   ;
a.cc:17:37: error: expected ')' before 'if'
   17 |     for (int j=0; strings[j] != ''\0'; j++) {
      |         ~                           ^
      |                                     )
   18 |       if (strings[j] == 'A') {
      |       ~~                             
a.cc:24:9: error: 'a_count' was not declared in this scope
   24 |     if (a_count < b_count) {
      |         ^~~~~~~
a.cc:24:19: error: 'b_count' was not declared in this scope
   24 |     if (a_count < b_count) {
      |                   ^~~~~~~
a.cc: At global scope:
a.cc:34:3: error: expected unqualified-id before 'if'
   34 |   if (a_remain <= b_remain) {
      |   ^~
a.cc:36:5: error: expected unqualified-id before 'else'
   36 |   } else {
      |     ^~~~
a.cc:39:3: error: 'cout' does not name a type
   39 |   cout << answer << endl;
      |   ^~~~
a.cc:40:1: error: expected declaration before '}' token
   40 | }
      | ^
Language: C++

#define _USE_MATH_DEFINES
#include<bits/stdc++.h>
#define int long long
#define rep(i,n) for(int i=0;i<n;i++)
#define Rep(i,a,b) for(int i=0;i<b;i++)
#define REP(i,a,b) for(int i=0;i<=b;i++)
#define rev(i,n) for(int i=n-1;i>=0;i--)
#define vi vector<int>
#define vvi vector<vi>
#define pb push_back
#define pi pair<int,int>
#define vp vector<pair<int,int>>
#define mp make_pair
#define all(v) (v).begin(),(v).end()
#define fi first
#define se second
#define MEMSET(a) memset(a,0,sizeof(a))
#define inf (1ll<<60)
#define Yes(f) cout <<(f?"Yes":"No")<<endl//fが真の場合Yesを出力、偽の場合Noを出力
#define yes(f) cout <<(f?"yes":"no")<<endl
#define YES(f) cout <<(f?"YES":"NO")<<endl
#define SORT(v) sort(all(v))
#define RSORT(v) sort(all(v),greater<int>())

using namespace std;

const int mod=1e9+7;

signed main(){
    int n;
    cin >> n;
    vector<string> s(n);

    int ans=0;
    rep(i,n)
    {
        cin >> s[i];
        rep(j,s[i].size()-1)
        {
            if(s[i][j]=='A'&&s[i][j+1]=='B')ans++;
        }
    }

    int lasta,fib;
    lasta=fib=0;
   // int doublecount=0;
    //int a=0;
    rep(i,n)
    {
        //if(s[i][0]=="A")fia++;
        if(s[i][s.size()-1]=='A')
        {
            lasta++;
           // a++;
        }
        if(s[i][0]=='B')
        {
        fib++;
       // a++;
        }
        //if(a==2)doublecount++;
        ///a=0;
        //if(s[i][n-1]=="B")lastb++;
    }
     if(lasta==fib&&lasta=doublecount)ans+=doublecount-1;
     ans+=min(lasta,fib);

    cout << ans << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:65:27: error: 'doublecount' was not declared in this scope; did you mean 'double_t'?
   65 |      if(lasta==fib&&lasta=doublecount)ans+=doublecount-1;
      |                           ^~~~~~~~~~~
      |                           double_t
Language: C++

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
int main(){
  ll n,i,j,m,c=0,ca=0,cb=0,cab=0;
  cin>>n;
  string s;
  for(i=0;i<n;i++){
	cin>>s;
    m=s.size();
    for(j=0;j<m-1;j++){
		if(s[j]=='A'&&s[j+1]=='B'){
          c++;
        }
    }
    if(s[0]=='B'&&s[m-1]!='A'){
	   cb++;
    }else if(s[m-1]=='A'&&s[0]!='B'){
       ca++;
    }else if(s[0]='B'&&s[m-1]=='A'){
	   cab++;
    }
  }

  if(cab==0){
    cout<<c+min(ca,cb)<<endl;
  }else{
    if(ca==0&&cb==0){
    cout<<c+cab<<endl;
    }else{
     cout<<c+cab+1+min(ca-1,cb-1)<<endl;
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:33:2: error: expected '}' at end of input
   33 | }
      |  ^
a.cc:4:11: note: to match this '{'
    4 | int main(){
      |           ^
Language: C++

#include <iostream>
#include <algorithm>
#include <vector>
#include <string>
using namespace std;
int main(){
    string s;
    int n; cin >> n;
    bool aflag = false;
    int cnt = 0;
    int bcnt = 0;
    int acnt = 0;
    int same = 0;
    for(int i = 0; i < n; i++){
        cin >> s;
        aflag = false;
        for(int j = 0; j < s.size(); j++){
            if(s[j] == 'A'){
                aflag = true;
            }else if(aflag && s[j] == 'B'){
                cnt++;
            }else{
                aflag = false;
            }
        }
        if(a.front() == 'A' && a[1] != 'B')acnt++;
        if(a.back() == 'B' && a[a.size()-2] != 'A')bcnt++
        if(a.front() == 'A' && a.back() == 'B')same++;
    }
    int m = min(acnt, bcnt);
    if(m == same && m != 0){
        m -= 1;
    }
    
    cout << cnt + ( - same<< endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:26:12: error: 'a' was not declared in this scope
   26 |         if(a.front() == 'A' && a[1] != 'B')acnt++;
      |            ^
a.cc:27:12: error: 'a' was not declared in this scope
   27 |         if(a.back() == 'B' && a[a.size()-2] != 'A')bcnt++
      |            ^
a.cc:27:58: error: expected ';' before 'if'
   27 |         if(a.back() == 'B' && a[a.size()-2] != 'A')bcnt++
      |                                                          ^
      |                                                          ;
   28 |         if(a.front() == 'A' && a.back() == 'B')same++;
      |         ~~                                                
a.cc:35:27: error: invalid operands of types 'int' and '<unresolved overloaded function type>' to binary 'operator<<'
   35 |     cout << cnt + ( - same<< endl;
      |                     ~~~~~~^~~~~~~
a.cc:35:34: error: expected ')' before ';' token
   35 |     cout << cnt + ( - same<< endl;
      |                   ~              ^
      |                                  )
Language: C++

#include <iostream>
#include <string.h>
#include <vector>
using namespace std;
#define rep(v,n) for(int v=0;v<n;v++)
int main(){
int n,a,b,ab=0;
a=0;
b=0;
char s[11];
int c=0;
cin>>n;
rep(i,n){
  cin>>s;
  int l=strlen(s);
  
  if(s[B]=='A'&&s[l-1]=='A')ab++;
  else{
  if(s[0]=='B')a++;
  if(s[l-1]=='A')b++;
  }
  rep(j,l-1){
  if(s[j]=='A'&&s[j+1]=='B')c++;
}
}

int m=min(a,b);

m=max(m,ab);
c+=m*2;
ab-=m;
a-=m;
b-=m;

m=min(a,b);
c+=m;
a-=m;
b-=m;

if(0<ab){
c+=ab-1;
if(0<a+b)c+=1;
}


cout<<c;

return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:17:8: error: 'B' was not declared in this scope
   17 |   if(s[B]=='A'&&s[l-1]=='A')ab++;
      |        ^
Language: C++

#include <algorithm>
#include <deque>
#include <functional>
#include <iomanip>
#include <iostream>
#include <limits.h>
#include <map>
#include <math.h>
#include <queue>
#include <set>
#include <string>
#include <string.h>
#include <unordered_map>
#include <unordered_set>
#include <vector>
#define rep(i,n) for(int i=0;i<n;i++)
#define REP(i,n) for(int i=1;i<=n;i++)
#define eps LDBL_EPSILON
#define moder 1000000007
#define int long long
#define ll long long
#define double long double
#define INF LLONG_MAX/3
#define P pair<int,int>
#define prique priority_queue
using namespace std;
int n;
string s[10010];
signed main() {
	cin >> n;
	int ans = 0;
	int a = 0, b = 0, c = 0;
	rep(i, n) {
		cin >> s[i];
		if (s[i].back() == 'A')a++;
		if (s[i][0] == 'B')b++;
		if (s[i].back() == 'A' && s[i][0] == 'B')c++;
	}
	ans = n - 1;
	if (b == n)ans = min({ ans, a, b - 1 });
	if (a == n)ans = min({ ans, a - 1, b });
	if (a == c && a)ans = min({ ans, a, b - 1 });
	if (b == c && b)ans = min({ ans, a - 1, b });
	ans = min({ ans,a,b });
	rep(i, n) {
		rep(j, s[i].size() - 1) {
			if (s[i][j] == 'A' && s[i][j + 1] == 'B')ans++;
		}
	}
	else cout << ans << endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:50:9: error: 'else' without a previous 'if'
   50 |         else cout << ans << endl;
      |         ^~~~
Language: C++

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

int main()
{
  int n;
  cin >> n;
  int answer = 0;

  for (int i=0; i<n; i++){
    char strings[12];
    cin >> strings;
    int a_count = 0;
    int b_count = 0;
    int a_remain = 0;
    int b_remain = 0;
    for (int j=0; strings[j] != "\0"; i++) {
      if (strings[j] == "A") {
        a_count++;
      } else if (strings[i] == "B") {
        b_count++;
      }
      if (a_count < b_count) {
        answer += a_count;
        b_remain++;
      } else if (b_count < a_count) {
        answer += b_count;
        a_remain++;
      } else {
        answer += a_count;
      }
    }
    if (a_remain <= b_remain) {
      answer += a_remain;
    } else {
      answer += b_remain;
    }
  }
  cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:17:30: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
   17 |     for (int j=0; strings[j] != "\0"; i++) {
      |                   ~~~~~~~~~~~^~~~~~~
a.cc:18:22: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
   18 |       if (strings[j] == "A") {
      |           ~~~~~~~~~~~^~~~~~
a.cc:20:29: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
   20 |       } else if (strings[i] == "B") {
      |                  ~~~~~~~~~~~^~~~~~
a.cc:39:11: error: 'ans' was not declared in this scope; did you mean 'abs'?
   39 |   cout << ans << endl;
      |           ^~~
      |           abs
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define rep(i,N) for(int i=0;i<int(N);++i)
#define rep1(i,N) for(int i=1;i<int(N);++i)
#define all(a) (a).begin(),(a).end()		//sort(all(vi S)) sort(all(string S))
#define push_back pb
#define print(v) { cerr<<#v<<": [ "; for(auto _ : v) cerr<<_<<", "; cerr<<"]"<<endl; }

using P = pair<int, int>;		//P.first, P.second
typedef long long ll;
typedef vector<int> vi;
typedef set<int> seti;
typedef vector<string> vs;

const int MOD = 1e9+7;
const int INF = 1e9;

int main() {
	int N;
	cin>>N;
	vector<string> s(N);
	rep(i,N)cin>>s[i];
	int ans = 0;
	int len = 0;
	//並べる前にある文字列を数え上げ（O(N*10))
	for (int i = 0; i < N; ++i){
		len = s[i].size();
		for (int j = 0; j+1 < len ; ++j){
			if(s[i][j] == 'A' && s[i][j+1] == 'B'){
				ans++;
			}
		}
	}
	int c = 0;
	int a = 0;
	int b = 0;
	int a_all = 0;
	int b_all = 0;
	for (int i = 0; i < N; ++i){
		len = s[i].size();
		if(s[i][len-1] == 'A'&&s[i][0] =='B'){
			c++;
			a_all++;
			b_all++;
		}
		else if(s[i][len-1] == 'A'){
			a++;
			a_all++;
		}
		else if(s[i][0] == 'B'){
			b++;
			b_all++;
		}
	}
	/*cerr<<"ans: "<<ans<<endl;
	cerr<<c<<a<<b<<endl;*/
/*	if(a == 0&&b == 0)ans += min(N-1,c-1);
	else ans += min(N-1,min(a_all,b_all));*/
	// ans += min(a+b+c - 1, min(a_all,b_all));
	ans += c-1;
	if(b>0){
		ans+=1:
		b--;
	}
	if(a>0){
		ans+= 1;
		a--;
	}
	ans += min(a,b);
	cout<<ans<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:62:23: error: expected ';' before ':' token
   62 |                 ans+=1:
      |                       ^
      |                       ;
Language: C++

#include <bits/stdc++.h>
using namespace std;
using ll = long long; using ull = unsigned long long;
//#define int ll
using vb = vector<bool>; using vvb = vector<vb>;
using vi = vector<int>; using vvi = vector<vi>;
using vl = vector<ll>; using vvl = vector<vl>;
template<class T> using V = vector<T>;
template<class T> using VV = vector<V<T>>;
#define fi first
#define se second
#define maxs(x,y) (x=max(x,y))
#define mins(x,y) (x=min(x,y))
using pii = pair<int,int>; using pll = pair<ll,ll>;
#define FOR(i,a,b) for(ll i = (a); i < (ll)(b); ++i)
#define REP(i,n) FOR(i,0,n)
#define RFOR(i,a,b) for(ll i = (ll)(b)-1;i >= a;--i)
#define RREP(i,n) RFOR(i,0,n)
#define ALL(obj) (obj).begin(), (obj).end()
#define rALL(obj) (obj).rbegin(), (obj).rend()
#define eb(val) emplace_back(val)
const double PI = acos(-1), EPS = 1e-10;
const ll MOD = 1e9+7;
void cioacc(){//accelerate cin/cout
cin.tie(0);
ios::sync_with_stdio(false);
}
int abct(string &s){
  int res = 0;
  int now = 0;
  while(now<(int)s.size()&&((now = s.find("AB",now)) != -1)){
    res++;
    now+=2;
  }
  return res;
}
signed main(){
  int n;
  cin >> n;
  vector<string> s(n);
  int a=0,b=0,id=0;
  REP(i,n) {
    cin >> s[i];
    ans += abct(s[i]);
    if(s[i].back()=='A'&&s[i].front()=='B') id++;
    if(s[i].back()=='A') ++a;
    if(s[i].front()=='B') ++b;
  }
  if(id==a&&id==b) a--,b--;
  if(n==1){
    cout << abct(s[0]) << endl;
    return 0;
  }
  int ans = 0;
  REP(i,n) {
    cin >> s[i];
    ans += abct(s[i]);
    if(s[i].back()=='A'&&s[i].front()=='B') id++;
    if(s[i].back()=='A') ++a;
    if(s[i].front()=='B') ++b;
  }
  if(id==a&&id==b) a--,b--;
  // else if(id==a) b--;
  // else if(id==b) a--;
  ans += min({a,b,n-1});
  cout << ans << endl;
  // vi diff;
  // set_difference(a.begin(), a.end(),b.begin(), b.end(),std::inserter(diff, diff.end()));
  // string t;
  // int fs = 0;
  // if((int)b.size()==n) fs = 0;
  // else {
  //   REP(i,b.size()){
  //     if(b[i]!=i){
  //       fs = i;
  //       break;
  //     }
  //   }
  //   fs = b.size();
  // }
  // set<int> st;
  // REP(i,n){
  //   st.insert(i);
  // }
  // t += s[fs];
  // st.erase(fs);

}


Compiler output:
a.cc: In function 'int main()':
a.cc:44:5: error: 'ans' was not declared in this scope; did you mean 'abs'?
   44 |     ans += abct(s[i]);
      |     ^~~
      |     abs
Language: C++

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

int main()
{
  int n;
  cin >> n;
  int answer = 0;

  for (int i=0; i<n; i++){
    char strings[500];
    cin >> strings;
    int a_count = 0;
    int b_count = 0;
    int a_remain = 0;
    int b_remain = 0;
    for (int j=0; strings[j] != "\0"; i++) {
      if (strings[j] == "A") {
        a_count++
      } else if (strings[i] == "B") {
        b_count++
      }
      if (a_count < b_count) {
        answer += a_count
        b_remain++
      } else if (b_count < a_count) {
        answer += b_count
        a_remain++
      } else {
        answer += a_count
      }
    }
    if (a_remain <= b_remain) {
      answer += a_remain
    } else {
      answer += b_remain
    }
  }
  cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:17:30: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
   17 |     for (int j=0; strings[j] != "\0"; i++) {
      |                   ~~~~~~~~~~~^~~~~~~
a.cc:18:22: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
   18 |       if (strings[j] == "A") {
      |           ~~~~~~~~~~~^~~~~~
a.cc:19:18: error: expected ';' before '}' token
   19 |         a_count++
      |                  ^
      |                  ;
   20 |       } else if (strings[i] == "B") {
      |       ~           
a.cc:20:29: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
   20 |       } else if (strings[i] == "B") {
      |                  ~~~~~~~~~~~^~~~~~
a.cc:21:18: error: expected ';' before '}' token
   21 |         b_count++
      |                  ^
      |                  ;
   22 |       }
      |       ~           
a.cc:24:26: error: expected ';' before 'b_remain'
   24 |         answer += a_count
      |                          ^
      |                          ;
   25 |         b_remain++
      |         ~~~~~~~~          
a.cc:27:26: error: expected ';' before 'a_remain'
   27 |         answer += b_count
      |                          ^
      |                          ;
   28 |         a_remain++
      |         ~~~~~~~~          
a.cc:30:26: error: expected ';' before '}' token
   30 |         answer += a_count
      |                          ^
      |                          ;
   31 |       }
      |       ~                   
a.cc:34:25: error: expected ';' before '}' token
   34 |       answer += a_remain
      |                         ^
      |                         ;
   35 |     } else {
      |     ~                    
a.cc:36:25: error: expected ';' before '}' token
   36 |       answer += b_remain
      |                         ^
      |                         ;
   37 |     }
      |     ~                    
a.cc:39:11: error: 'ans' was not declared in this scope; did you mean 'abs'?
   39 |   cout << ans << endl;
      |           ^~~
      |           abs