88分

#include<bits/stdc++.h>
using namespace std;
int n;
string s;
int x=0;
int c;
int main(){
	cin>>n;
	cin>>s;
	int l=s.size();
	for(int i=0;i<l-1;i++){
		if(s[i]=='V'&&s[i+1]=='K'){
			x++;
		}
        if((s[i]=='V'&&s[i+1]=='V'&&c==0)||(s[i]=='K'&&s[i+1]=='K'&&c==0)){
            c++;
            x++;
        }
	}
	cout<<x;
	return 0;
}