求平均值

#include<bits/stdc++.h>
using namespace std;
int x,countt;
int main(){
	cin>>n>>m;
	for(int i=1;i<=n;i++){
		cin>>x;
		countt+=x;
	}
	if(1.0/n*countt>=m) cout<<"YES";
	else cout<<"NO";
}