Preparing NOJ

# Problem Submitted Passed AC Rate
NOJ1021 二叉树复制和左右子树互换 8 3 37.5%
NOJ1022 哈夫曼编码与译码 41 5 12.2%
NOJ1023 字符串排序 32 12 37.5%
NOJ1024 01排序 11 10 90.91%
NOJ1025 完数 29 10 34.48%
NOJ1026 五位以内的对称素数 36 10 27.78%
NOJ1027 Quicksum 42 7 16.67%
NOJ1028 Digital Roots 22 7 31.82%
NOJ1029 短语搜索 3 2 66.67%
NOJ1030 ACM程序设计之马拉松竞赛 38 5 13.16%
NOJ1031 建筑群最长坡值 15 8 53.33%
NOJ1032 三角形数 26 8 30.77%
NOJ1033 硬件DIY秀 1 0 0%
NOJ1034 IBM技术俱乐部主席竞选 9 5 55.56%
NOJ1035 行列式求值 9 1 11.11%
NOJ1036 自由堆叠的屋顶 1 1 100%
NOJ1037 模运算 29 11 37.93%
NOJ1038 最小代价树 8 3 37.5%
NOJ1039 加分二叉树 1 1 100%
NOJ1040 约数之和 10 9 90%

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implementation dp math greedy data structures brute force dfs and similar constructive algorithms graphs binary search sortings trees ...