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We are given an array let’s say, arr[] of integer values and the task is to calculate the count of array elements that divides the sum of all other elements.

Arrays a kind of data structure that can store a fixed-size sequential collection of elements of the same type. An array is used to store a collection of data, but it is often more useful to think of an array as a collection of variables of the same type.

Input− int arr_1[] = {9, 6, 3}Output− count is 3

**Explanation** − As the sum of elements 9+6 = 15 which is divisible by 3, sum of elements 9+3 =12 which is divisible by 6 and 6+3 = 9 which is divisible by 9. Therefore, count is 3.

Input− arr[] = {3, 10, 4, 6, 7}Output− count is 3

**Explanation** − As the sum of elements 10+4+6+7 = 27 which is divisible by 3, sum of elements 3+4+6+7 =20 which is divisible by 10 and 3+10+4+7 = 24 which is divisible by 6. Therefore, count is 3.

Create an array let’s say, arr[]

Calculate the length of an array using the length() function that will return an integer value as per the elements in an array.

Take a temporary variable that will store the count of elements.

Start loop for i to 0 and i less than size of array

Inside the loop, set temporary variable let’s say temp to 0

Inside the loop, start another loop for j to 0 and j less than size of an array

Check if i = j then continue

Else, set temp = temp + arr[j]

Now check if temp % arr[i] =0 then increment the value of count by 1

Return the count

Print the result.

#include <iostream> using namespace std; int countelements( int arr_1[], int size){ // To store the count of required numbers int result = 0; for (int i = 0; i < size; i++){ // Initialize sum to 0 int sum = 0; for (int j = 0; j < size; j++){ if (i == j){ continue; } else{ sum += arr_1[j]; } } // If sum is divisible by the chosen element if (sum % arr_1[i] == 0){ result++; } } // Return the count return result; } // main function int main(){ int arr_1[] = { 1, 2, 3, 4, 5, 6 }; int size = sizeof(arr_1) / sizeof(arr_1[0]); cout <<"count is " <<countelements(arr_1, size); return 0; }

If we run the above code we will get the following output −

count is 2

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