试了很多次还是过不了

再来看看我60分的代码

#include<bits/stdc++.h>
using namespace std;
int main(){
	int max_bike=50,max_walk=0,n;
    double a,b;
	cin>>n;
	while(a<=n&&b<=n){
		a+=1.2;
		b+=3.0;
		max_bike++;
		max_walk++;
	}
	if(max_walk<max_bike){
		cout<<"Bike";
	}else if(max_walk>max_bike){
		cout<<"Walk";
	}
	else cout<<"All";
}

虽然样例没过

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哪个大佬帮帮我