这题我题都看了好久

#include<bits/stdc++.h>
using namespace std;
double maxx(double s1,double s2,double s3){
	return max(s1,max(s2,s3));
}
int main(){
	double a1,a2,a3;
	cin>>a1>>a2>>a3;
	printf("%.3lf",maxx(a1,a2,a3)/maxx(a1+a2,a2,a3)/maxx(a1,a2,a2+a3));
	return 0;
}