from decimal import Decimal, getcontext
import sys
input = sys.stdin.readline

N = int(input())
ans = Decimal(0)
d = {}
getcontext().prec = 17
for _ in range(N):
    x = int(input())
    if x in d:
        ans += d[x]
    else:
        d[x] = Decimal(x).sqrt()
        ans += d[x]
    print(ans)