建议递推orz
by abs001 @ 2019-02-24 14:29:39
建议打表$ORZ$ ~~（逃~~
by aminoas @ 2019-02-24 14:35:55
@[濤鐵窮氣](/space/show?uid=133813) 太慢了，复杂度指数
by 樱初音斗橡皮 @ 2019-02-24 14:38:53
建议您开个数组存答案
by 111l @ 2019-02-24 14:42:37
建议记忆化
by HoshinoTented @ 2019-02-24 14:49:20
明白了，谢谢各位！
by NewJersey @ 2019-02-24 14:52:42
前排围观撞脸
by zi小眼聚光 @ 2019-02-24 15:24:08