#include<iostream>
#include<vector>
using namespace std;

class Solution {
public:
    bool containsDuplicate(vector<int>& nums) {
        sort(nums.begin(),nums.end());
        for(int i{1};i<nums.size();++i){
            if(nums[i]==nums[i-1]){
                return true;
            }
        }
        return false;
    }
};
