#include<bits/stdc++.h>
using namespace std;
int n, num;
bool flag = false;
string a;
int main()
{
    cin >> n;
    cin >> a;
    for (int i = 1; i < n; i++)
    {
        if (a[i - 1] == 'V' && a[i] == 'K'){num++;a[i]=a[i-1]='x'};
        if (a[i - 1] == a[i])flag = true;
    }
    if (flag)num++;
    cout << num;
    return 0;
}