#include<cstdio>
#include<iostream>
#include<algorithm>
using namespace std;
int main(){
	int n;
	char s[105];
	cin>>n;
	int tot=0,ans=0;
	for(int i=1;i<=n;i++) cin>>s[i];
	//for(int i=1;i<=n;i++) cout<<s[i];
	for(int i=1;i<=n;i++){
		if(s[i]=='V'&&s[i+1]=='K') ans++;
		else if(s[i]=='V'&&s[i+1]!='K') tot++;
		else if(s[i]=='K'&&s[i+1]!='V') tot++;
	}
	if(tot>0) ans++;
	cout<<ans;
	return 0;
}