今天的題目蠻簡單的
今日耗時:7mins

217. Contains DuplicateGiven
     Given an integer array nums, return true if any value appears at least twice in the array, and return false if every element is distinct.

class Solution {
public:
    bool containsDuplicate(vector<int>& nums){
        int n=nums.size();
        sort(nums.begin(),nums.end());
        for(int i=0;i<n-1;i++){
            if(nums[i]==(nums[i+1])){
                return true;
            }  
        }
        return false;
    }
};