0/1背包问题的几种解法，包括回溯法、动态规划法以及穷举法。另外还包括集中方法的一个测试报告。-0/1 knapsack problem several solutions, including backtracking, dynamic programming method and the exhaustive method. It also includes a focus on methods of test reports.

kdtree java 实现。。 实现了一个sql优化，减少了回溯次数，家少了执行时间-The kdtree java. . . . A sql optimization, reduce the number of backtracking, the home less execution time

用Java实现的回溯法 用预见算法解骑士游历问题。-Java implementation of backtracking