#include<cstdio>
#include<cmath>
#include<cstring>
#include<string>
#include<iostream>
using namespace std;
int main()
{
    int n,sum=0;
    string s;
    cin>>n;
    cin>>s;
    for(int i=0;i<=n;i++)
    {
        if(s[i]=='V'&&s[i+1]=='K')
		{
		    sum++;
		    s[i]='v';
			s[i+1]='k';
		}
    }
    for(int i=0;i<=n;i++)
    {
        if(s[i]==s[i+1])
	    {
	        sum++;
		    printf("%d",sum);
		    return 0;
	    }
	}
    printf("%d",sum);
    return 0;
}