import sys, time, random
from collections import deque, Counter, defaultdict
input = lambda: sys.stdin.readline().rstrip()
ii = lambda: int(input())
mi = lambda: map(int, input().split())
li = lambda: list(mi())
inf = 2 ** 63 - 1
mod = 998244353
from math import sqrt

n = ii()


now = 0


for i in range(n):
    now += int(sqrt(ii()) * 10 ** 15)
    to = str(now)
    
    print(to[:-15] + '.' + to[-15:17])