Given a positive integer n, find the least number of perfect square numbers (for example, 1, 4, 9, 16, ...) which sum to n. Example 1: Input: n = 12 O ...
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其他好文 时间:
2020-06-28 09:27:41
阅读次数:
56
We continue practicing simple SQL queries on a single table. This tutorial is concerned with a table of Nobel prize winners: nobel(yr, subject, winner ...
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数据库 时间:
2020-06-27 20:33:19
阅读次数:
101
介绍 treap是tree和heap的组合词,说明这种数据结构有树的特点又有堆的特点。本质是一颗二叉搜索树。 treap的结点除了key关键字外还有个priority关键字。treap除了要保证key满足二叉搜索树性质,还要保证当前priority大于等于两个子节点的priority(即堆的性质)。 ...
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其他好文 时间:
2020-06-27 13:10:38
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52
Equations are given in the format A / B = k, where A and B are variables represented as strings, and k is a real number (floating point number). Given ...
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其他好文 时间:
2020-06-27 10:08:38
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52
Combination Sum II (M) 题目 Given a collection of candidate numbers (candidates) and a target number (target), find all unique combinations in candidate ...
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其他好文 时间:
2020-06-27 10:04:01
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52
Range Sum Query - Immutable (E) 题目 Given an integer array nums, find the sum of the elements between indices i and j (i ≤ j), inclusive. Example: Give ...
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其他好文 时间:
2020-06-27 09:44:58
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46
恢复内容开始 Range Sum Query 2D - Immutable (M) 题目 Given a 2D matrix matrix, find the sum of the elements inside the rectangle defined by its upper left cor ...
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其他好文 时间:
2020-06-27 09:36:59
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61
First Missing Positive (H) 题目 Given an unsorted integer array, find the smallest missing positive integer. Example 1: Input: [1,2,0] Output: 3 Example ...
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其他好文 时间:
2020-06-27 09:31:04
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53
MySQL 查询所有存储过程视图 等等 INFORMATION_SCHEMA.TABLES INFORMATION_SCHEMA.TABLES是MySQL自带的(被视作)一个信息数据库,保存着MySQL服务器所维护的其他数据库的信息。INFORMATION_SCHEMA.TABLES其中有数个只读表 ...
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数据库 时间:
2020-06-27 00:25:56
阅读次数:
90