C++ で、配列のすべての要素を等しくするために必要な演算の数を求めます。

Input : arr[] = {7, 3, 3, 3}
Output : 3

#include<bits/stdc++.h>
using namespace std;
int findOperationCount(int arr[],int n){
   int j = 0, operations = 0;
   int maxVal = arr[0];
   int minVal = arr[0];
   int maxValInd = 0;
   for (int i = 1; i < n; i++){
      if(arr[i] > maxVal){
         maxVal = arr[i];
         maxValInd = i;
      }
      if(arr[i] < minVal){
         minVal = arr[i];
      }
   }
   for (int i =0;i<n;i++){
      if (arr[i] != maxVal && arr[i] <= minVal && arr[i] != 0){
         arr[j] += 1;
         arr[maxValInd] -= 1;
         maxVal -= 1;
         operations += 1;
         j += 1;
      }
      else if (arr[i] != 0){
         j += 1;
      }
   }
   for (int i = 0; i < n; i++){
      if (arr[i] != maxVal){
         operations = -1;
         break;
      }
   }
   return operations;
}
int main(){
   int arr[] = {4, 4, 8, 4};
   int n = sizeof(arr)/sizeof(arr[0]);
   cout<<"The number of operations required to make all array  elements Equal is "<<findOperationCount(arr, n);
   return 0;
}

The number of operations required to make all array elements Equal is 3