leetcode刷题日记——Remove Element

Given an array and a value, remove all instances of that value in place and return the new length.

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

问题分析：题目目标就是删除掉目标元素。解决办法，将向量中的不是目标元素重组，返回长度即可；实现代码如下：

class Solution {
public:
int removeElement(vector<int>& nums, int val) {
if(nums.size()==0) return 0;
int size=nums.size();
int index=0;
for(int i=0;i<size;i++){
if(nums[i]!=val)
nums[index++]=nums[i];
}
return index;
}
};