def sqrt_floor(x):
    ceil = x
    floor = 1
    while ceil > floor + 1:
        m = (ceil+floor)//2
        if m*m <= x:
            floor = m
        else:
            ceil = m
    return floor

import decimal
from decimal import Decimal
decimal.getcontext().prec=20
inv_error = 10**20
N = int(input())
ans = Decimal(0)
for _ in range(N):
    x = int(input())
    p = sqrt_floor(x)
    if p*p == x:
        ans += p
    else:
        R = 1
        U, V = 2, 2*p
        a, b = 2*p, x-p*p
        while R < inv_error:
            R *= 2*p
            U, V = V, a*V + b*U
        ans += Decimal(V-p*U)/Decimal(U)
    print(ans)