AC

#include <bits/stdc++.h>
using namespace std;
int main()
{
int a,b,x1,y1,x2,y2,x3,y3;
cin>>a>>b;

cin>>x1>>y1;
cin>>x2>>y2;
cin>>x3>>y3;

if( (b/y1)*x1>=a ) cout<<"YES";
else if( (b/y2)*x2>=a ) cout<<"YES";
else if( (b/y3)*x3>=a ) cout<<"YES";
else cout<<"NO";

return 0;

}