题解

#include<iostream>
using namespace std;
int main(){
int n,k,s=0;
cin>>n;
double a[111111],b[111111],c[111111];
for(int i = 1;i <= n;i++){
cin>>a[i]>>b[i];
c[i]=b[i]/a[i];
}
cin>>k;
for(int i = 1;i <= n;i++){
if(c[i]>=k)s++;
}
cout<<s;
}