026. Remove Duplicates from Sorted Array

 1 class Solution {
 2 public:
 3     int removeDuplicates(vector<int>& nums) {
 4         if (nums.size() == 0) return 0;
 5         int j = 0;
 6         for (int i = 1; i < nums.size(); ++i) {
 7             if (nums[i] != nums[j]) {
 8                 nums[++j] = nums[i];
 9             }
10         }
11         return j + 1;
12     }
13 };