Function calculateMaxMin

Hackerrank_problems/Max_Min/solution.cpp:6–16

calculateMaxMin is helper function for iterate k subArray that return max - min

// calculateMaxMin is helper function for iterate k subArray that return max - min
int calculateMaxMin(vector<int>arr, int start, int k) {
    int maxNum = INT_MIN;
    int minNum = INT_MAX;
    
    for (int i = start; i < start + k; i++) {
        maxNum = max(maxNum, arr[i]);
        minNum = min(minNum, arr[i]);
    }

    return maxNum - minNum;
}

// Complete the maxMin function below.
int maxMin(int k, vector<int> arr) {