require "big"

n = read_line.to_i64
xi = (0...n).map { |i| {read_line.to_i64, i} }
ans = [0.0] * n

acc = 0.0
xi.each do |(x, i)|
  acc += Math.sqrt(x)
  ans[i] = acc
end

ans.each do |x|
  printf "%.16f\n", x
end