【LeetCode】3. Remove Element

class Solution {
public:
int removeElement(vector<int>& nums, int val) {
int length = nums.size();
bool flag = false;
for(int i=0;i<length;i++)
{

if(nums[i] == val)
{
nums.erase(nums.begin()+i);
length--;
i--;
}

}
return length;
}
};