#include<bits/stdc++.h>
using namespace std;
int sum;
int main(){
	int n;
	cin>>n;
	string a;
	cin>>a;bool 
	b[n]={0};
	for(int i=0;i<n;i++){
		if((a[i]=='V'&&a[i+1]=='K') sum+=1;b[i]=1;b[i+1]=1;
	}
	for(int i=0;i<n;i++){
		if((a[i]=='V'&&a[i+1]=='V'&&b[i]==0&&b[i+1]==0)||(a[i]=='K'&&a[i+1]=='K'&&b[i]==0&&b[i+1]==0))b[i]=1;b[i+1]=1;sum+=1; break;
	}
	cout<<sum;
	return 0;
}