Sukat

input/code.cpp: In function 'int main()':
input/code.cpp:12:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   12 |     for (int i = 0; i < s.length(); i++) {
      |                     ~~^~~~~~~~~~~~
input/code.cpp:20:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 |     for (int i = 0; i < s.length(); i++) {
      |                     ~~^~~~~~~~~~~~

#include <bits/stdc++.h>

using namespace std;

int main() {
    string abc = "ABCDEFGHIJKLMNOPQRSTUWVXYZ";
    
    string s;
    cin >> s;
    
    deque<int> sukat;
    for (int i = 0; i < s.length(); i++) {
        sukat.push_back((int) s[i]);
    }

    sort(sukat.begin(), sukat.end());

    vector<pair<int, int>> res;

    for (int i = 0; i < s.length(); i++) {
        if (sukat.back() == sukat.front()) {
            break;
        }
        res.push_back({ sukat.back(), sukat.front() });
        sukat.pop_back();
        sukat.pop_front();
    }


    cout << res.size();
    for (auto p : res) {
        cout << ((char) p.first) << ((char) p.second) << "\n";
    }

}

// g++ --std=c++11 -O2 -Wall test.cpp -o test && ./test

Test 1

Group: 1, 2, 3

Verdict: WRONG ANSWER

Test 2

Group: 1, 2, 3

Verdict: ACCEPTED

Test 3

Group: 1, 2, 3

Verdict: WRONG ANSWER

Test 4

Group: 1, 2, 3

Verdict: ACCEPTED

Test 5

Group: 1, 2, 3

Verdict: WRONG ANSWER

Test 6

Group: 1, 2, 3

Verdict: WRONG ANSWER

Test 7

Group: 1, 2, 3

Verdict: ACCEPTED

Test 8

Group: 2, 3

Verdict: WRONG ANSWER

Test 9

Group: 2, 3

Verdict: ACCEPTED

Test 10

Group: 2, 3

Verdict: WRONG ANSWER

Test 11

Group: 2, 3

Verdict: WRONG ANSWER

Test 12

Group: 2, 3

Verdict: WRONG ANSWER

Test 13

Group: 2, 3

Verdict: WRONG ANSWER

Test 14

Group: 2, 3

Verdict: WRONG ANSWER

Test 15

Group: 3

Verdict: WRONG ANSWER

Test 16

Group: 3

Verdict: ACCEPTED

Test 17

Group: 3

Verdict: WRONG ANSWER

Test 18

Group: 3

Verdict: WRONG ANSWER

Test 19

Group: 3

Verdict: WRONG ANSWER

Test 20

Group: 3

Verdict: WRONG ANSWER

Test 21

Group: 3

Verdict: WRONG ANSWER