[LeetCode-27]-Remove Element (删除指定元素)

题目相关

【题目解读】
使用In-place(原地算法)，从数组中删除指定值的所有元素，并返回删除后的数组长度。

【原题描述】原题链接
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 array, you must do this by modifying the input array in-place with O(1) extra memory.

The order of elements can be changed. It doesn’t matter what you leave beyond the new length.

Example 1:
Given nums = [3,2,2,3], val = 3,

Your function should return length = 2, with the first two elements of nums being 2.

It doesn't matter what you leave beyond the returned length.

【难度】Easy

Solution