| acm (28) | ZOJ (1) | hdu2059 (1) | 3636 (1) |
| usaco (17) | ural1002 (1) | hdu (1) | 3254 (1) |
| 算法 (8) | uasco (1) | foj (1) | 3157 (1) |
| poj (7) | the clock (1) | bt (1) | 2872 (1) |
| dp (3) | poj2785 (1) | 贪心 (1) | 2424 (1) |
| toj (2) | poj2159 (1) | 树状数组 (1) | 2192 (1) |
| cf (2) | Packing Rectangles (1) | 解题报告 (1) | 1179 (1) |
| 线段树 (2) | hdu2838 (1) | 3817 (1) | 1065 (1) |
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