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.

 

1 class Solution { 2 public: 3     int removeElement(vector
     
      & nums, int val) { 4         int length = 0; 5         for(int i = 0; i < nums.size(); i++){ 6             if(nums[i] != val) 7                 nums[length++] = nums[i]; 8         } 9         return length;10     }11 };