def sqrt(n):
    if not n: return 0
    x = 1 << (n.bit_length() + 1) // 2
    y = (x + n // x) // 2
    while y < x:
        x = y
        y = (x + n // x) // 2
    return x | 1

def tostr(n):
    a, b = str(n // 10 ** 20), str(n % (10 ** 20)).zfill(20)
    if len(a) > 15:
        return a
    return a + "." + b[:16 - len(a)]

N, *X = map(int, open(0).read().split())
s = 0
ANS = []
for x in X:
    s += sqrt(x * 10 ** 40)
    ANS.append(tostr(s))

print(*ANS, sep = "\n")