217. Contains Duplicate

题目来源【Leetcode】

Given an array of integers, find if the array contains any duplicates. Your function should return true if any value appears at least twice in the array, and it should return false if every element is distinct.

这道题就是判断数组是否有重复的整数，比较简单，直接上代码

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