递归算法和递推算法，题目简单，请大家认真完成
| Standing | User | Nick Name | Solved | TIME PENALTY | A | B | C | D |
| 1 | clq2019 | 陈利奇 | 4 | 62:40:45 | 14:30:34 | 15:05:22 | 15:38:33(-7) | 15:06:16 |
| 2 | ljk2019 | 楼峻康 | 3 | 02:08:33 | 00:41:21 | 00:43:18 | (-6) | 00:43:54 |
| 3 | dzy2019 | 丁子洋 | 3 | 101:02:28 | 26:55:33 | 27:01:58 | 46:04:57(-3) | (-1) |
| 4 | hyc2019 | 胡彦超 | 2 | 01:06:50 | 00:29:47 | 00:37:03 | (-2) | |
| 5 | ljh2019 | 李俊皓 | 2 | 42:39:42 | 21:18:46 | 21:20:56 | ||
| 6 | czr2019 | 陈梓睿 | 2 | 70:12:11 | 42:40:21(-3) | 26:31:50 | (-3) | |
| 7 | wsy2019 | 王晟炀 | 1 | 17:33:51 | 17:33:51 | |||
| 8 | lkj2019 | 楼凯杰 | 1 | 25:55:26 | (-2) | 25:55:26 | ||
| 9 | cxz2019 | 崔祥志 | 1 | 41:47:14 | 41:27:14(-1) | |||
| 10 | wht2019 | 王宏天 | 1 | 47:12:35 | (-1) | 47:12:35 |