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377. Combination Sum IV
错误的做法: 因为dp[j][i] != dp[j -1] + dp[j], 因为nums[j -1] 可能用多次, 不是只用一次, 这样就少写了情况, 看来不是维度越多越好, 只要找到一维, 按着这一个状态来递推就行, 一般是文中的题意变量作为状态, 不要老是想着遍历到第几个变量作为状态 Foll ...
分类:其他好文   时间:2017-08-08 13:55:30    阅读次数:154
HDU 6073 Matching In Multiplication dfs遍历环 + 拓扑
Matching In Multiplication Problem DescriptionIn the mathematical discipline of graph theory, a bipartite graph is a graph whose vertices can be divid ...
分类:其他好文   时间:2017-08-06 21:54:21    阅读次数:176
Codeforces 837E Vasya's Function - 数论
Vasya is studying number theory. He has denoted a function f(a,?b) such that: f(a,?0)?=?0; f(a,?b)?=?1?+?f(a,?b?-?gcd(a,?b)), where gcd(a,?b) is the g ...
分类:其他好文   时间:2017-08-05 17:46:04    阅读次数:166
Functional-Link Net Computing: Theory, System Architecture, and Functionalities
INPUT+ONE HIDDEN LAYER+OUTPUT 已经可以实现任意布尔函数。其实也可以是任意逼近 measurable函数。 MLP是universal approximators。既然One hidden layer的拟合能力已经这么强,可以让网络更宽一些。 Numerous and s ...
分类:Web程序   时间:2017-07-27 10:44:58    阅读次数:216
zoj 3827 Information Entropy 【水题】
Information Entropy Time Limit: 2 Seconds Memory Limit: 65536 KB Special Judge Information Theory is one of the most popular courses in Marjar Univers ...
分类:其他好文   时间:2017-07-26 22:15:36    阅读次数:211
40. Combination Sum II
比39. Combination Sum多了个从下一位递归而已 利用排序的性质 提高效率 ...
分类:其他好文   时间:2017-07-25 21:06:40    阅读次数:194
二次筛选区间素数 POJ2689
Prime Distance Description The branch of mathematics called number theory is about properties of numbers. One of the areas that has captured the inter ...
分类:其他好文   时间:2017-07-25 10:19:12    阅读次数:196
Useful Webpages for Competitive Programming
Graph Theory Mo's Algorithm https://www.hackerearth.com/practice/notes/mos-algorithm/ http://www.geeksforgeeks.org/mos-algorithm-query-square-root-dec ...
分类:Web程序   时间:2017-07-25 00:50:20    阅读次数:218
Feel Good 单调递增栈+前缀和
Feel Good Bill is developing a new mathematical theory for human emotions. His recent investigations are dedicated to studying how good or bad days in ...
分类:其他好文   时间:2017-07-23 14:26:20    阅读次数:183
May 10th 2017 Week 19th Wednesday
Imagination is the source of creation. 想象是创作之源。 Sometimes, creation and innovation are very simple, nothing more than combination of two or more exist ...
分类:其他好文   时间:2017-07-19 23:36:03    阅读次数:271
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