Easy understanding C++ solution


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


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