Sukat

input/code.cpp: In function 'void solve()':
input/code.cpp:23:22: warning: left operand of comma operator has no effect [-Wunused-value]
   23 |    for (int i = 0; i < n, i < j; ++i) {
      |                    ~~^~~
input/code.cpp:38:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::__cxx11::basic_string<char> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   38 |    for (int i = 0; i < ans.size(); ++i) {
      |                    ~~^~~~~~~~~~~~

#include<bits/stdc++.h>
using namespace std;
 
void init_code(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    #ifndef ONLINE_JUDGE
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
    #endif 
}

void solve() {
   string s;
   cin >> s;

   int n = s.size();

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

   vector<string> ans;
   int j = n - 1;
   for (int i = 0; i < n, i < j; ++i) {
      //if (i > j) break;
      //cout << s[i] << s[j] << '\n';
      if (s[i] != s[j]) {
         string t = "";
         t += s[i];
         t += s[j];
         ans.push_back(t);
         j--;
      } else {
         break;
      }
   }

   cout << ans.size() << '\n';
   for (int i = 0; i < ans.size(); ++i) {
      cout << ans[i] << '\n';
   }
}

int main() {
   init_code();
   solve();
   return 0;
}
 

Test 1

Group: 1, 2, 3

Verdict: ACCEPTED

Test 2

Group: 1, 2, 3

Verdict: ACCEPTED

Test 3

Group: 1, 2, 3

Verdict: ACCEPTED

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