https://atcoder.jp/contests/abc161 過去問。 A: ABC Swap a, b, c = gets.split.map(&:to_i) a, b = b, a a, c = c, a puts "#{a} #{b} #{c}" B: Popular Vote n, m = gets.split.map(&:to_i) votes = gets.split.map(&:to_i) limit = Rational(votes.inje…