为啥不对？

#include<iostream>
using namespace std;
int n;
double x,y,a,b;
int main(){
    cin>>n>>x>>y;
    double a=x/y;
    for(int i=2;i<=n;i++){
        cin>>x>>y;
        double b=x/y;
        if(a-b>=0.05) cout<<"worse"<<endl;
        else if(b-a>=0.05) cout<<"better"<<endl;
        else cout<<"same"<<endl;
    }
    return 0;
}

这红题太抽象了