from math import sqrt
import sys
pin=sys.stdin.readline

def main():
  N=int(pin())
  ans=0
  ansl=[]
  t=10**30
  s=10**15
  for _ in [0]*N:
    x=int(pin())*t
    ans+=sqrt(x)
    ansl.append(str(ans/s))
  answ="\n".join(ansl)
  print(answ)
  return
main()