#include<bits/stdc++.h>
#define int long long
using namespace std;
int n,a,b,c,x,minn=2e9,maxn;
signed main(){
	cin>>n>>a>>b;
	c=a+b;
	for(int i=1;i<=n;i++){
		cin>>x;
		x%=c;
		minn=min(minn,x);
		maxn=max(maxn,x);
	}
	if(maxn-minn>=a)cout<<"No";
	else cout<<"Yes";
	return 0;
}

求调&求hack