Peli

input/code.cpp: In function 'int main()':
input/code.cpp:17:6: warning: array subscript has type 'char' [-Wchar-subscripts]
   t[c] = 1;
      ^

#include <iostream>

using namespace std;

bool t[100];

int main()
{
	//ios_base::sync_with_stdio(false);
	//cin.tie(nullptr);
	int n, k;
	cin >> n >> k;
	int s = 0;
	for (int i = 0; i < n; ++i) {
		char c;
		cin >> c;
		t[c] = 1;
		if (t['A'] && t['B'] && t['C']) {
			++s;
			t['A'] = t['B'] = t['C'] = 0;
		}
	}
	if (k < 3) {
		cout << 0 << endl;
		return 0;
	}
	cout << s << 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