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ランダムに引いた4つの数字を、2つの二桁の数字にして、和を最大にする【ruby初心者】

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#はじめに

適当に引いた1桁の数字を、2枚ペアに分けて、2桁の数字にし和を最大化する。

#入力部分

input_line = gets.split(" ").map(&:to_i)
input_line = input_line.sort
#=> 配列が

#計算部分
1〜2番目に大きい数字は、2桁目。
後の2つは1桁目になる。

a = input_line[3]*10 + input_line[1]
b = input_line[2]*10 + input_line[0]

p a + b

ちなみに、上の3行を1行でも書ける。
その場合こんな感じ

p input_line[3]*10 + input_line[2]*10 + input_line[1] + input_line[0] 
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