摘要：
Given an integer, return its base 7 string representation. Example 1: Input: 100 Output: "202" Example 2: Input: 7 Output " 10" Note: The input will b 阅读全文
摘要：
We define a harmonious array is an array where the difference between its maximum value and its minimum value is exactly 1. Now, given an integer arra 阅读全文
摘要：
Merge two sorted linked lists and return it as a new list. The new list should be made by splicing together the nodes of the first two lists. Example: 阅读全文
摘要：
Given an array nums and a value val, remove all instances of that value in place and return the new length. Do not allocate extra space for another ar 阅读全文