import decimal
import sys
pin=sys.stdin.readline
decimal.getcontext().prec=30
def main():
  N=int(pin())
  ans=0
  ansl=[]
  for _ in [0]*N:
    x=int(pin())
    ans+=decimal.Decimal(x).sqrt()
    ansl.append(str(ans))
  answ="\n".join(ansl)
  print(answ)
  return
main()