leetcode 1502. 判断能否形成等差数列

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