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LeetCode Day22 remove-duplicates-from-sorted-array

class Solution {
public:
    int removeDuplicates(vector<int>& nums) {
        if(nums.empty()) return 0;
        int n=0;
        for(int i=1;i<nums.size();i++)
            if(nums[i]!=nums[n])
                nums[++n]=nums[i];
        return n+1;
    }
};