title: Minimum Increment K Operations Make Elements Equal
signature: function minimumIncrementKOperationsMakeElementsEqual(arr, n, k) {
test_code: 
  
  // SOLUTION CODE
  // ============================================
  PLACEHOLDER_CODE_BODY
  
  // TESTING CODE 
  // ============================================
  function convertToString(value) {
      return JSON.stringify(value, function (key, val) {
          if (val instanceof Set) {
              return Array.from(val);
          } return val;});
  }
  
  function validateSolution(actual, expected){
      return convertToString(actual)===convertToString(expected);
  }
  
  function driver(arr, n, k, expected){
      try{
          if (validateSolution(PLACEHOLDER_FN_NAME(arr, n, k),expected)){
              return "PASSED";
          }
          return "FAILED";
      } catch (error) {
        return error.name;
      }
      
  }
      
  function main(){
    let result = '';
    result = driver([4, 7, 19, 16], 4, 3, 10);
    console.log(`TEST-0...${result}`);
  
    result = driver([4, 4, 4, 4, 4], 5, 3, 0);
    console.log(`TEST-1...${result}`);
  
    result = driver([0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1], 39, 1, 24);
    console.log(`TEST-2...${result}`);
  
    result = driver([85, 36, 52, 8, 52, 15, 16], 5, 6, -1);
    console.log(`TEST-3...${result}`);
  
    result = driver([-10, -5, -5, -20, 10, 30], 6, 5, 36);
    console.log(`TEST-4...${result}`);
  
    result = driver([0, 1, 0, 0, 1, 1, 1, 0, 0, 0, 0, 1, 1, 0, 0, 1, 0], 10, 15, -1);
    console.log(`TEST-5...${result}`);
  
    result = driver([1, 5, 5, 9, 11, 12, 12, 13, 13, 14, 16, 18, 26, 26, 28, 28, 30, 31, 32, 37, 37, 38, 40, 43, 44, 45, 47, 47, 55, 58, 60, 62, 63, 64, 69, 78, 83, 84, 92, 96, 96, 99], 26, 33, -1);
    console.log(`TEST-6...${result}`);
  
    result = driver([76, -78, 92, -98, 16, 44, 86, 96, -8, 2, -96, 74, -28, 12, 54, -40, -64, -12, 4, 48, 68, -82, 8, 0, -4, 88, 48, -54, 90, 62, -84, 76, -48, 62, -80, -94, 38, -4, 36], 34, 3, -1);
    console.log(`TEST-7...${result}`);
  
    result = driver([0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1], 39, 10, -1);
    console.log(`TEST-8...${result}`);
  
    result = driver([62, 99, 29, 23, 55, 30, 79, 63, 1, 88, 59, 8, 11, 80, 23, 51, 97, 32, 80, 48, 84, 36, 73, 59, 1, 34, 92, 10], 18, 1, 892);
    console.log(`TEST-9...${result}`);
  
    process.exit(0);
  };
  
  if (require.main === module) {
    main();
  }
source_py: def minimum_increment_k_operations_make_elements_equal(arr, n, k):
      max1 = max(arr)
      res = 0
      for i in range(0, n):
          if (((max1 - arr[i]) % k) != 0):
              return (- 1)
          else:
              res += ((max1 - arr[i]) / k)
      return int(res)
source_cpp: int minimum_increment_k_operations_make_elements_equal(vector<int> arr, int n, int k) {
    int max = * max_element(arr.begin(), arr.end());
    int res = 0;
    for ( int i = 0;
    i < n;
    i ++ ) {
      if ( ( max - arr [ i ] ) % k != 0 ) return - 1;
      else res += ( max - arr [ i ] ) / k;
    }
    return res;
  }