Järjestys

input/code.cpp: In function 'int main()':
input/code.cpp:28:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (int i = 0; i < s.size(); ++i){
                         ~~^~~~~~~~~~
input/code.cpp:40:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (int i = acnt; i < s.size(); ++i){
                            ~~^~~~~~~~~~

#include <bits/stdc++.h>
 
using namespace std;
 
#define ull unsigned long long
#define ll long long
 
int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
 
    int t;
    cin >> t;
 
    string s;
    getline(cin, s);
 
    for (int i = 0; i < t; ++i){
 
        int acnt = 0;
        int bcnt = 0;
 
        int swp1 = 0;
        int swp2 = 0;
 
        getline(cin, s);
 
        for (int i = 0; i < s.size(); ++i){
            if(s[i] == 'A'){
                ++acnt;
            }else{
                ++bcnt;
            }
        }
        for (int i = 0; i < acnt; ++i){
            if(s[i] == 'B'){
                ++swp1;
            }
        }
        for (int i = acnt; i < s.size(); ++i){
            if(s[i] == 'A'){
                ++swp2;
            }
        }
 
 
 
        int tot = (swp2+swp1)/2;
 
        if(swp2 > swp1){
            tot += swp2-swp1;
        }
        if(swp1 > swp2){
            tot += swp1-swp2;
        }
 
        cout << tot << '\n';
    }
 
 
 
    flush(std::cout);
}

Test 1

Verdict: ACCEPTED