Two solutions, one as intended and one smarter solution based off of the constraints

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Difference(int[] elements){ this.elements = elements; this.maximumDifference = Integer.MIN_VALUE; }

// Add your code here
 int computeDifference(){
    for (int i = 0; i < elements.length; i++){
        for(int j = 0; j< elements.length;j++){
            int currentDiff = Math.abs(elements[i] - elements[j]);
            if (maximumDifference < currentDiff){
                maximumDifference = currentDiff;
            }
        }
    }
    return maximumDifference;
}

Difference(int[] elements){
    this.elements = elements;
    this.maximumDifference = Integer.MIN_VALUE;
}

// Add your code here
 int computeDifference(){
    int min = elements[0];
    int max = elements[0];
    for (int num : elements) {
        if (num < min) min = num;
        if (num > max) max = num;
    }
    maximumDifference = max - min;
    return maximumDifference;
}