leetcode 217. Contains Duplicate
class Solution { public: bool containsDuplicate(vector<int>& nums) { int length = nums.size(); if(length <= 0) return false; sort(nums.begin(),nums.end()); for(int i = 1;i < length;i++){ if(nums[i] == nums[i-1])return true; } return false; } };
這個題有很多種做法：https://leetcode.com/problems/contains-duplicate/discuss/61110/C++-solutions-(sorting-maps-and-sets).
還有Contains Duplicate II Contains Duplicate III
leetcode 217. Contains Duplicate
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