import math

n = int(input())
ans = 0
for _ in range(n):
    x = int(input())
    for __ in range(32):
        x *= 10
    ans += math.isqrt(x)
    e = ans
    p = 16
    while p >= 1 and e % 10 == 0:
        e //= 10
        p -= 1
    s = str(e)
    t = ""
    if len(s) > p:
        for i in range(len(s) - p):
            t += s[i]
        t += "."
        for i in range(len(s) - p, len(s)):
            t += s[i]
    else:
        for i in range(p - len(s)):
            t += "0"
        t += s
    print(t)