leetcode-go/leetcode/easy/401.binary-watch.go

func readBinaryWatch(num int) (res []string) {
	for h := uint8(0); h < 12; h++ {
		for m := uint8(0); m < 60; m++ {
			if bits.OnesCount8(h)+bits.OnesCount8(m) == num {
				res = append(res, fmt.Sprintf("%d:%02d", h, m))
			}
		}
	}
	return
}