摘要：Given an array A of non-negative integers, half of the integers in A are odd, and half of the integers are even. Sort the array so that whenever A[i]  阅读全文

摘要：Given two strings s and t , write a function to determine if t is an anagram of s. Example 1: Example 2: Note:You may assume the string contains only 阅读全文

摘要：Given a collection of intervals, merge all overlapping intervals. Example 1: Example 2: 题目大意：合并区间，[1,3]和[2,6]有交集，合并[1,6]。 思路一：先将数组排序，优先根据区间的第一个数排序，小的排 阅读全文