26. Remove Duplicates from Sorted Array

static int wing=[]()
{
    std::ios::sync_with_stdio(false);
    cin.tie(NULL);
    return 0;
}();

class Solution 
{
public:
    int removeDuplicates(vector<int>& nums) 
    {
        int sz=nums.size();
        if(sz<2)
            return sz;
        int i=0,j=1;
        while(j<sz)
        {
            if(nums[i]!=nums[j])
                nums[++i]=nums[j];
            j++;
        }
        return i+1;
    }
};

双指针，压缩重复元素