36分求助!这个哪里错了?

#include<bits/stdc++.h>
using namespace std;
int main(){
	string s;
	int n,c=0;
	cin>>n;
	cin>>s;
	for(int i=0;i<=n;i++){
		if((s[i]=='V'&&s[i+1]=='K')){
			c++;
			s[i]='x';
			s[i+1]='x';
		}
	}
	for(int i=0;i<=n;i++){
		if(
		(s[i]=='K'&&s[i+1]=='V')||
		(s[i]=='V'&&s[i+1]=='V')||
		(s[i]=='K'&&s[i+1]=='K')){
			c++;
		}
	}
	cout<<c;
}