08-14 HDU 6665 (分类讨论) 08-14 HDU 6667 (思维) 08-14 POJ 1753 Flip Game (DFS) 08-14 POJ 2251 Dungeon Master (BFS) 08-14 HDU 2553 N皇后问题 (DFS) 08-14 HDU 6628 permutation 1 (暴力) 08-14 HDU 6656 (期望DP 逆元) 08-14 2016 ICPC Mid-Central USA J. 08-14 POJ 3468 (分块) 08-14 HDU 6651 Final Exam (思维) 08-14 2018 ECNA Regional Contest J. 08-10 2017 ICPC Urumqi A.coins (期望) 08-06 HDU 1548 A strange lift (BFS) 08-06 HDU 2266 How Many Equations Can You Find (DFS) 08-06 POJ 3641 Pseudoprime numbers (数论+快速幂) 08-06 POJ-1995-Raising-Modulo-Numbers-快速幂 08-06 快速幂取模算法