leetcode-217-Contains Duplicate
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问题
题目:[leetcode-217]
思路
借助集合即可。
代码
class Solution {public: bool containsDuplicate(vector<int>& nums) { std::set<int> set_nums; int sz = nums.size(); if(!sz) return false; for( int i = 0 ; i< sz; ++i ){ if(set_nums.find(nums[i])!= set_nums.end()) return true; else set_nums.insert( nums[i] ); } return false; }};
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