Question

Write a python program to check values in list are in arithmetic progression

Answer 1

// C++ program to check if a given array

// can form arithmetic progression

#include<bits/stdc++.h>

using namespace std;

 

// Returns true if a permutation of arr[0..n-1]

// can form arithmetic progression

bool checkIsAP(int arr[], int n)

{

 if (n == 1)

   return true;

 

 // Sort array

 sort(arr, arr + n);

 

 // After sorting, difference between

 // consecutive elements must be same.

 int d = arr[1] - arr[0];

 for (int i=2; i<n; i++)

   if (arr[i] - arr[i-1] != d)

     return false;

 

 return true;

}

 

// Driven Program

int main()

{

 int arr[] = { 20, 15, 5, 0, 10 };

 int n = sizeof(arr)/sizeof(arr[0]);

 

 (checkIsAP(arr, n))? (cout << "Yes" << endl) :

                      (cout << "No" << endl);

 

 return 0;

}