package q3461

func hasSameDigits(s string) bool {
	buf := []byte(s)
	for i := range buf {
		buf[i] = buf[i] - '0'
	}

	for len(buf) > 2 {
		for i := range len(buf) - 1 {
			buf[i] = (buf[i] + buf[i+1]) % 10
		}
		buf = buf[:len(buf)-1]
	}
	return buf[0] == buf[1]
}

var _ = hasSameDigits