#include<iostream>
using namespace std;
int main()
{
    int no_trip;
    float dist,fuel;
    double effi;
    for(int i=0;i<no_trip;i++)
    {
        cin>>dist>>fuel
        cout<<"\n";

        if(dist<=0)
        {
            cout<<"Invalid input";
            return 0;
        }
        else if(fuel<=0)
        {
            cout<<"Invalid input";
            return 0;
        }
        else
        {
            
        }
    }
    return 0;
}