#include <iostream>
#include <string>
using namespace std;
int main()
{
	string word;
	int n,num=0;
	cin>>n;
	cin>>word;
	for(int i=0;i<n;i=i++)
	{
		if(word[i]=='V'&&word[i]=='k')
		{
			num++;
			word[i]='x';
			word[i+1]='x';	
		}
		
	}
	for(int i=0;i<n;i++)
	{
		if(word[i]!='x'&&word[i]==word[i+1])
		{
			num++;
			break;
		}
	}
	cout<<num<<endl;
	return 0;
}