#include <bits/stdc++.h>
using namespace std;
int main(){
	int a,b,c,d,e,f,k,l;
	cin>>a>>b>>c>>d>>e;
	f=c+d+e;
	k=20-f;
	l=k*b;
	if(l>=a){
		cout<<"YES";
	}else{
		cout<<"NO";
	}
}
/**************************************************************
	Problem: 1634
	User: tonghuawei
	Language: C++
	Result: Accepted
	Time:3 ms
	Memory:2072 kb
****************************************************************/