#include <bits/stdc++.h>
#define int long long
using namespace std;
int n,ans;
char a[101];
signed main ()
{
	ios::sync_with_stdio (false);
	cin>>n;
	for (int i=1;i<=n;i++) cin>>a[i];
	for (int i=1;i<=n;i++)
		if ((a[i]=='V'&&a[i+1]=='K'))
			i++,ans++;
	for (int i=1;i<=n;i++)
		if (a[i]=='V'&&a[i+1]=='V') {ans++;break;}
			else if (a[i]=='K'&&a[i+1]=='K') {ans++;break;}
	cout<<ans<<endl;
	return 0;
}