Peli

#include <iostream>
#include <vector>
#include<algorithm>
#include <map>
using namespace std;
using ll = long long;
map<char, int> m;

int main() {
  ll n, k;
  cin >> n >> k;
  string s;
  ll p = 0;
  cin >> s;
  for (auto u : s) {
    if (!m[u]) m[u] ++;
    if (m['A'] && m['B'] && m['C']) {
      p++;
      m['A'] = 0;
      m['B'] = 0;
      m['C'] = 0;
    }
  }
  if (k != 3) p = 0;
  cout << p << endl;
}

Test 1

Group: 1, 2, 3

Verdict: ACCEPTED

Test 2

Group: 2, 3

Verdict: WRONG ANSWER

Test 3

Group: 3

Verdict: WRONG ANSWER

Test 4

Group: 1, 2, 3

Verdict: ACCEPTED

Test 5

Group: 1, 2, 3

Verdict: ACCEPTED