PKU(http://poj.org/)的大量题目解答，都是被Accept的源代码，包括排序、搜索(二分、宽度优先、深度优先)、动态规划、图算法等类型，详见其中的summary文件-a large number of solutions for questions from PKU (http://poj.org/), all Accepted source code, including sorting, searching, (binary-search, breadth-first, de