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题意 给出一个区间的集合，请合并所有重叠的区间。 示例 输入: [[1,3],[2,6],[8,10],[15,18]] 输出: [[1,6],[8,10],[15,18]] 解释: 区间 [1,3] 和 [2,6] 重叠, 将它们合并为 [1,6]. 思路 贪心，按照每个区间的开始值，从小到大排序 阅读全文
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Programming Ability Test (PAT) is organized by the College of Computer Science and Technology of Zhejiang University. Each test is supposed to run sim 阅读全文
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A number that will be the same when it is written forwards or backwards is known as a Palindromic Number . For example, 1234321 is a palindromic numbe 阅读全文