#include<bits/stdc++.h>

using namespace std;

int main(){
	int n,cnt=0;
	cin>>n;
	string s;
	cin>>s;
	int i=0;
	for(i=0;i<s.length();i++){
	if(s[i]=='V'&&s[i+1]=='V') {
		cnt++; break;}
	if(s[i]=='K'&&s[i+1]=='K') {
			cnt++; break;
	}
 }
 
	for(int j=0;j<s.length();j++){
		if((s[j]=='V')&&(s[j+1]=='K')) cnt++;
		
		}
	cout<<cnt;	 
	
}