217. Contains Duplicate.cpp

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


/*
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.

 

Example 1:

Input: nums = [1,2,3,1]
Output: true
Example 2:

Input: nums = [1,2,3,4]
Output: false
Example 3:

Input: nums = [1,1,1,3,3,4,3,2,4,2]
Output: true
 

Constraints:

1 <= nums.length <= 105
-109 <= nums[i] <= 109
*/