F只有两种可能值(0/1)
by Prean @ 2020-12-11 13:09:05
@[expwmh](/user/107484)
蒟蒻太弱了,推不出len=20之前的,大佬能说的详细点吗?
by lao_li @ 2020-12-11 13:20:21
@[lao_li](/user/317650) 好吧,当我没说,oeis查不到
by wmy_goes_to_thu @ 2020-12-11 13:26:29
@[lao_li](/user/317650) 暴力枚举C的长度,暴力枚举AB的长度,然后计算出可能的A的方案数即可
by shenmadongdong @ 2020-12-11 13:28:47