https://atcoder.jp/contests/abc158 過去問。 A:Station and Bus s = gets.chomp puts (s == "AAA" || s == "BBB") ? "No" : "Yes" B:Count Balls n, a, b = gets.split.map(&:to_i) blue_ball = (n / (a + b)) * a remainder = n % (a + b) blue_ball += (…