[LeetCode] 442. Find All Duplicates in an Array

题解来自 点击打开链接， vector<int> findDuplicates(vector<int>& nums) { vector<int> res; for(unsigned int i=0;i<nums.size();++i) { nums[abs(nums[i])-1]=-nums[abs(nums[i])-1]; if(nums[abs(nums[i])-1]>0) res.push_back(abs(nums[i])); } return res; }