#include<bits/stdc++.h>
using namespace std;
int main()
{
    string s;
    int n, ans=0;
    cin>>n>>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+1]==s[i])
        {
            ans++;
            cout<<ans;
            return 0;
        }
    }
    cout<<ans;
    return 0;
}