#include<iostream>
#include<cstring>
using namespace std;
int n,s;
char a[1005];
int main(){
	cin>>n;
	cin>>a;
	for(int i=0;i<n;i++){
		if(a[i]=='V'&&a[i+1]=='K'){
			s++;
			a[i]=='0',a[i+1]=='0';
		}
	}
	for(int i=0;i<n;i++){
		if(a[i]!='0'&&a[i]==a[i+1]){
			s++;
			break;
		}
	}
	cout<<s;
	return 0;
}