1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")

#include <bits/stdc++.h>

using namespace std;

void solve() {
    int n;
    cin >> n;
    string s;
    cin >> s;
    int group_size = n / 10;
    int points = 0;
    for (int group = 0; group < 10; group++) {
        bool ok = true;
        for (int i = 0; i < group_size; i++) {
            ok &= s.back() == 'T'; s.pop_back();
        }
        points += ok;
    }   
    cout << points << endl;
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);

// #ifdef LOCAL
//     geti(t); while (t--)
// #endif

    solve();

    cout.flush();
}