#include<iostream>
#include<string>
using namespace std;
int main(){
    int ans;
    int n;
	string s;
	cin>>n;
	cin>>s;
	for(int i=0;i<=n-1;i++){
		if(s[i]=='V'&&s[i+1]=='K'){
		ans++;
		s[i]='v';
		s[i+1]='k';
		}
	}
	for(int i=0;i<=n-1;i++){
		if(s[i]==s[i+1]){
			ans++;
			cout<<ans;
			return 0;
		}
	}
	cout<<ans;
	return 0;
}

不知道为什么，测试点就是过不去