0分求助！！！

#include<iostream>
using namespace std;
int main()
{
    double n,a,b;
    cin>>n;
    a=n/1.2;
    b=n/3.0+27+23;
    if(a>b)
    {
        cout<<"bike";
    }
    else if(a<b)
    {
        cout<<"walk";
    }
    else
    {
        cout<<"all";
    }
    return 0;
}