Mercury Engineering and Consultation Task

task.java

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package javaapplication4;

import java.util.ArrayList;

/**
 *
 * @author Mohamed AbdelraZek
 */
public class task {

    public static void main(String[] args) {

        ArrayList<Integer> list = new ArrayList<>();
        // Try any sequence b2a ;) 
        list.add(140);
        list.add(345);
        list.add(160);
        list.add(24);
        list.add(200);
        list.add(11);
        list.add(200);

        showResut(list);
    }

    public static void showResut(ArrayList<Integer> list) {
        int diff = 0;
        int min = 0;
        int max = 0;

        for (int i = 0; i < list.size(); i++) {
            for (int j = 0; j < list.size(); j++) {
                if ((list.get(j) - list.get(i)) > diff) {
                    diff = (list.get(j) - list.get(i));
                    if (i < j) {
                        min = list.get(i);
                        max = list.get(j);

                    }
                }
            }

        }
        System.out.println("You should buy with " + min + "$ and sell with  " + max + "$");

    }

}