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
37
38
39
40
41
42
43
#include <bits/stdc++.h>
using namespace std;
#define mk make_pair
#define fst first
#define sz(x) x.size()
#define snd second
#define pb push_back
#define VAR(v) #v << " = " << v << " "
#define debug if (0)
#define M_PI 3.14159265358979323846
typedef complex<long double> C;
typedef long long ll;
typedef pair<int, int> ii;
typedef vector<ll> Matrix;
const int maxn = (int)1e6 + 9;
const int INF = (int)1e9 + 7;
int mod = (int)1e9 + 7;

int main(int argc, char *argv[])
{
    ios::sync_with_stdio(false);
    debug;
    else cin.tie(NULL), cout.tie(NULL);
    int n;
    cin >> n;
    int f = n / 10;
    int t = 0, res = 0;
    string s;
    cin >> s;
    for (int i = 1; i <= n; i++)
    {
        if (s[i - 1] == 'T')
            t++;
        if (i % f == 0)
        {
            if (t == f)
                res++;
            t = 0;
        }
    }
    cout << res << "\n";
    return 0;
}