#include<bits/stdc++.h>
using namespace std;
int n;
char a[105];
int main()
{
	cin>>n;
	for (int i=1;i<=n;i++)
	{
		cin>>a[i];
	}
	int t=0,ans=0;
	for (int i=1;i<n;i++)
	{
		if (a[i]=='V'&&a[i+1]=='K') ans++;
		if (a[i]=='K'&&a[i+1]=='K'&&t==0)
		{
			t=-1;
			ans++;
		}
		if (a[i]=='V'&&a[i+1]=='V'&&t==0)
		{
			t=-1;
			ans++;
		}
	}
	cout<<ans;
	return 0;
}