#include <bits/stdc++.h>
using namespace std;

char a[110];

int main (){
	int n;
	cin >> n;
	for(int i=1;i<=n;i++){
		cin >> a[i];
	}
	int num=0,vvnum=0,kknum=0;
	for(int i=1;i<=n;i++){
		if(a[i]=='V'&&a[i+1]=='K'){
			num++;
			a[i]='n';
			a[i+1]='n';
			i++;
		}
		if(a[i]=='V'&&a[i+1]=='V'){
			vvnum++;
		}
		if(a[i]=='K'&&a[i+1]=='K'){
			kknum++;
		}
	}
	if(vvnum==0&&kknum==0) cout << num << "\n";
	else cout << num+1 << "\n";
	return 0;
}