Submission #760520

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Source Code Expand

#include<iostream>
#include<vector>
#include<string>
#include<algorithm>	
#include<map>
#include<set>
#include<utility>
#include<cmath>
#include<cstring>
#include<queue>
#include<cstdio>
#include<sstream>
#define loop(i,a,b) for(int i=a;i<b;i++) 
#define rep(i,a) loop(i,0,a)
#define pb push_back
#define mp make_pair
#define all(in) in.begin(),in.end()
const double PI=acos(-1);
const double EPS=1e-8;
const int inf=1e9;
using namespace std;
typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef pair<int,int> pii;
int main(){
	int q;
	cin>>q;
	while(q--){
		int a,b;
		cin>>a>>b;
		if(a!=b){
			if(a>b)swap(a,b);
			double out=hypot(b/2.,a);
			printf("%.9f\n",out);
		}else{
			printf("%.9f\n",a*4./(sqrt(6)+sqrt(2)));
		}
	}
}

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