#include<iostream>
#include<iomanip>
#include<cstdio>
#include<cstring>
#include<cmath>
using namespace std;
bool tag[101];
int main(){
	int n,ans=0;
	string s;
	cin>>n>>s;
	for(int i=0;i<n-1;i++){
		if(s[i]='V'&&s[i+1]=='K'){
			ans++;
			tag[i]=1;
			tag[i+1]=1;
			i++;
		}
	}
	for(int i=0;i<n-1;i++){
		if(s[i]==s[i+1]&&!tag[i]&&!tag[i+1]){
			ans++;
			break;
		}
	}
	cout<<ans;
	return 0;
}