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RSS订阅原创 HackerRank- Minimum Swap 2 数组排序最小交换次数
原题： https://www.hackerrank.com/challenges/minimum-swaps-2/problem?h_l=interview&playlist_slugs%5B%5D=interview-preparation-kit&playlist_slugs%5B%5D=arrays 问题的关键是找到闭环。假设每个闭环有k个数字，则闭环内交换次数为...
2018-09-11 22:28:48
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原创 LeetCode 219. Contains Duplicate II
Given an array of integers and an integer k, find out whether there are two distinct indices i and j in the array such that nums[i] = nums[j] and the difference between i and j is at most k.
2016-04-12 20:43:04
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数据库系统概念(Database system concepts第五版答案（超全）)
数据库系统概念（Database system concepts）这本书第五版的课后习题答案，每一题都有，exercise是官方的部分答案，其余答案找不到就到sol里去找，都有，很全的
2014-03-18
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