please look at me

#include<iostream>
using namespace std;

int main(){

int a,b,x,y;
bool k=0;
cin>>a>>b;
for(int i=0;i<=3;i++){
    cin>>x>>y;
    if(b/y*x>=a){k=1;break;}
}
if(k)cout<<"YES";
else cout<<"NO";
return 0;

}