trener

input/code.cpp: In function 'int main()':
input/code.cpp:19:11: warning: array subscript has type 'char' [-Wchar-subscripts]
     x[s[0]]++;
           ^
input/code.cpp:20:15: warning: array subscript has type 'char' [-Wchar-subscripts]
     if (x[s[0]] == 5) c.push_back(s[0]);
               ^

#include <bits/stdc++.h>
#define ll long long
#define INF 999999999
#define N (1<<17)
#define M 1000000007

using namespace std;

char x[255];

int main () {
  int n;
  cin>>n;
  vector<char> c;
  
  for (int i = 0; i < n; i++) {
    string s;
    cin>>s;
    x[s[0]]++;
    if (x[s[0]] == 5) c.push_back(s[0]);
  }
  sort(c.begin(), c.end());
  if (c.empty()) cout<<"PREDAJA";
  else for (char x : c) cout<<x;
  cout<<endl;
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED

Test 7

Verdict: ACCEPTED

Test 8

Verdict: ACCEPTED

Test 9

Verdict: ACCEPTED

Test 10

Verdict: ACCEPTED

Test 11

Verdict: ACCEPTED

Test 12

Verdict: ACCEPTED

Test 13

Verdict: ACCEPTED

Test 14

Verdict: ACCEPTED

Test 15

Verdict: ACCEPTED