import decimal
from math import sqrt
import sys

def Bisect_Int(ok,ng,is_ok):
    while abs(ok-ng)>1:
        mid=(ok+ng)//2
        if is_ok(mid):
            ok=mid
        else:
            ng=mid
    return ok

readline=sys.stdin.readline
N=int(readline())
decimal.getcontext().prec=20
ans=decimal.Decimal(0)
for _ in range(N):
    x=int(readline())
    if x:
        def is_ok(n):
            return n*n<=x
        r=decimal.Decimal(Bisect_Int(0,1<<30,is_ok))
        for i in range(4):
            r=(r**2+x)/(2*r)
        ans+=r
    print(ans)