Language: C++

#include <iostream>
#include <string>
#include <cstring>
#include <fstream>
#include <random>
#include <cmath>
#include <iomanip>
#include <climits>
#include <cstdlib>
#include <algorithm>
#include <vector>
#include <map>
#include <deque>
#include <map>
#include <set>
#include <queue>
#include <stack>
#include <list>
#include <unordered_map>
#include <bitset>
#include <sstream>

typedef  long long ll;
#define mop 1000000007
using namespace std;


int main() {
    
    ll n;
    cin >> n;
    ll ans = 0;
    ll numa = 0, numb = 0, numab = 0;
    for(ll i=0;i<n;i++){
        string s;
        cin >> s;
        for(ll j=0;j<s.length()-1;j++){
            if(s[j] == 'A' and s[j+1] == 'B'){
                ans++;
            }
        }
        if(s[s.length()-1] == 'A' and s[0] == 'B'){
            numab++;
        }else if(s[s.length()-1] == 'A'){
            numa++;
        }else if(s[0] == 'B'){
            numb++;
        }
    }
//    cout << numa << numb << endl;
//    cout << ans << endl;
//    ll l = max(numa, numb);
//    ll s = min(numa, numb);
//    if((l-s) >= numab){
//        ans += s + numab;
//    }else{
//        ans += (l+s+numab)/2;
//    }
    ll fina = numa + numab;
    ll finb = numb + numab;
    if(numa == 0){
        finb--;
    }
    if(numb == 0){
        fina--;
    }

    cout << max(0,min(fina, finb)) + ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:68:16: error: no matching function for call to 'max(int, const long long int&)'
   68 |     cout << max(0,min(fina, finb)) + ans << endl;
      |             ~~~^~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/14/string:51,
                 from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algobase.h:257:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  257 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note:   template argument deduction/substitution failed:
a.cc:68:16: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'long long int')
   68 |     cout << max(0,min(fina, finb)) + ans << endl;
      |             ~~~^~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  303 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note:   candidate expects 3 arguments, 2 provided
In file included from /usr/include/c++/14/algorithm:61,
                 from a.cc:10:
/usr/include/c++/14/bits/stl_algo.h:5706:5: note: candidate: 'template<class _Tp> constexpr _Tp std::max(initializer_list<_Tp>)'
 5706 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5706:5: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5716:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::max(initializer_list<_Tp>, _Compare)'
 5716 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5716:5: note:   template argument deduction/substitution failed:
a.cc:68:16: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   68 |     cout << max(0,min(fina, finb)) + ans << endl;
      |             ~~~^~~~~~~~~~~~~~~~~~~