26_RemoveDuplicatesfromSortedArray - a920604a/leetcode GitHub Wiki

class Solution {
public:
    int removeDuplicates(vector<int>& nums) {
        int slow = 0, fast = 0, n= nums.size();
        while(fast<n){
            // 維護nums[0...slow] 無重複就好
            if(nums[slow] != nums[fast]) nums[++slow] = nums[fast];
            fast++;
        }
        return slow+1;
    }
};