1496C - Diamond Miner - CodeForces Solution

import math
import sys


for m in range(int(input())):
    n=int(input())
    ax=[]
    ay=[]
    for i in range(2*n):
        x,y=map(int,input().split()) 
            if(x==0):
            ay.append(abs(y))
        if(y==0):
            ax.append(abs(x))
    ax.sort()
    ay.sort()
        ans=0
        for i in range(n):
        ans+=(math.sqrt((ax[i]**2) + (ay[i]**2)))
    print(ans)