#include<bits/stdc++.h>
using namespace std;
char s[105]; 
int main () {
	int n;
	cin >> n;
	for (int i = 0; i < n; i++) {
		cin >> s[i];
	}
	int cnt = 0;
	int change = 1;
	for (int i = 0; i < n; i++) {
		if (s[i] == 'V' && s[i+1] == 'K') {
			cnt++;
			i++;
			continue;
		}
		else {
			if (s[i] == s[i+1]) {
				cnt += change;
				change = 0;
			}
		}
	}
	cout << cnt << endl;
	return 0;
}

屈辱历史