1502_Can_Make_Arithmetic_Progression_From_Sequence.cpp

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