这么做肯定AC！

#include<iostream>
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/y1x1>=a)cout<<"YES";
else if(b/y2x2>=a)cout<<"YES";
else if(b/y3*x3>=a)cout<<"YES";
else cout<<"NO";
return 0;
}