문제
풀이
#include <iostream>
#include <string>
#include <unordered_set>
using namespace std;
void solve(void) {
int n; char c; cin >> n >> c;
unordered_set<string> s;
while (n--) {
string t; cin >> t;
s.insert(t);
}
cout << s.size() / (c == 'Y' ? 1 : c == 'F' ? 2 : 3);
}
int main(void) {
ios::sync_with_stdio(false);
cin.tie(nullptr);
solve();
return 0;
}