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1020 Tree Traversals (25 分)
Suppose that all the keys in a binary tree are distinct positive integers. Given the postorder and inorder traversal sequences, you are supposed to ou ...
分类:其他好文   时间:2019-11-25 18:02:45    阅读次数:74
Codeforces Round #602 (Div. 2, based on Technocup 2020 Elimination Round 3) B. Box 贪心
B. Box Permutation p is a sequence of integers p=[p1,p2,…,pn], consisting of n distinct (unique) positive integers between 1 and n, inclusive. For exa ...
分类:其他好文   时间:2019-11-25 00:18:54    阅读次数:91
Vue咖啡app项目总结
一、构建 Vue有自己的脚手架构建工具vue-cli,使用起来非常方便,使用webpack来集成各种开发便捷工具,比如: Hot-reload Vue的热更新,修改代码之后无需手动刷新网页,对前端开发来说非常方便 PostCss,再也不用去管兼容性的问题了,只针对chrome这样的现代浏览器写css ...
分类:移动开发   时间:2019-11-23 23:44:16    阅读次数:171
Calculation 2
Calculation 2 Given a positive integer N, your task is to calculate the sum of the positive integers less than N which are not coprime to N. A is said ...
分类:其他好文   时间:2019-11-22 19:42:38    阅读次数:65
PAT甲级——A1145 HashingAverageSearchTime【25】
The task of this problem is simple: insert a sequence of distinct positive integers into a hash table first. Then try to find another sequence of inte ...
分类:其他好文   时间:2019-11-22 01:09:29    阅读次数:81
PAT甲级——A1144 TheMissingNumber【20】
Given N integers, you are supposed to find the smallest positive integer that is NOT in the given list. Input Specification: Each input file contains ...
分类:其他好文   时间:2019-11-21 22:58:17    阅读次数:83
PAT 甲级 1145 Hashing - Average Search Time (25 分)(读不懂题,也没听说过平方探测法解决哈希冲突。。。感觉题目也有点问题)
1145 Hashing - Average Search Time (25 分) The task of this problem is simple: insert a sequence of distinct positive integers into a hash table first. ...
分类:其他好文   时间:2019-11-20 16:57:03    阅读次数:104
检测识别问题中的metrics
之前一直记不熟各种指标的具体计算,本文准备彻底搞定这个问题,涵盖目前遇到过的所有评价指标。 TP,TN,FP,FN 首先是true false和positive negative这两对词。以二分类为例: positive和negative指的是预测的分类是正样本还是负样本,true和false指的是 ...
分类:其他好文   时间:2019-11-17 14:55:32    阅读次数:102
Java大数类 BigInteger
package bigint; /** * This class encapsulates a BigInteger, i.e. a positive or negative integer * with any number of digits, which overcomes the compu ...
分类:编程语言   时间:2019-11-17 14:43:40    阅读次数:85
[LC] 367. Valid Perfect Square
Given a positive integer num, write a function which returns True if num is a perfect square else False. Note: Do not use any built-in library functio ...
分类:其他好文   时间:2019-11-17 12:31:52    阅读次数:68
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