def gi
  gets.to_i
end

def gm
  gets.split.map(&:to_i)
end

def gc
  gets.chomp
end

def gf
  gets.to_f
end

n = gi
sum = 0.0
(1..n).each do |i|
  x = gi
  sum += Math.sqrt(x)
  puts format("%.20f", sum)
end