def gi
  gets.chomp.to_i
end

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

def gc
  gets.chomp
end

def gs
  gets.chomp.split
end

N = gi
ans = 0
for i in 0..N-1
  x = gi
  ans += Math.sqrt(x)
  puts sprintf("%.20f", ans)
end