0437デフォルトの名無しさん
2018/11/12(月) 20:31:45.80ID:q04ZIundp (0..99).select{|i| i.digits(2).count(1).odd?};
# => [1, 2, 4, 7, 8, 11, 13, 14, 16, 19, 21, 22, 25, 26, 28, 31, 32,
35, 37, 38, 41, 42, 44, 47, 49, 50, 52, 55, 56, 59,61, 62, 64, 67,
69, 70, 73, 74, 76, 79, 81, 82, 84, 87, 88, 91, 93, 94, 97, 98]
