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- if (nums.size() < 2) return nums.size();
- int l = 1;
- int r = 1;
- while(r < nums.size()){
- if (nums[r - 1] == nums[r]){
- ++r;
- continue;
- }
- nums[l] = nums[r];
- ++l;
- ++r;
- }
- return l;
- }
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