// Program to test solutions to problem #4 on the cse143x midterm, fall 2018.
// Fill in your solution to mirrorCollapse, then compile and run the
// program.  Note that it does not test whether the exception is thrown.

import java.util.*;

public class FinalTest4 {
    public static void mirrorCollapse(Stack<Integer> s) {
        // fill in your solution here
        // you can also rename the parameter above
    }

    // this is the sample solution
    public static void mirrorCollapse2(Stack<Integer> s) {
        Queue<Integer> q = new LinkedList<Integer>();
        while (!s.isEmpty()) {
            q.add(s.pop());
        }
        int oldSize = q.size();
        for (int i = 0; i < oldSize / 2; i++) {
            s.push(q.remove());
        }
        if (oldSize % 2 == 1) {
            q.add(q.remove());
        }
        while (!s.isEmpty()) {
            q.add(q.remove() + s.pop());
        }
        while (!q.isEmpty()) {
            s.push(q.remove());
        }
    }

    private static int testCount;
    private static int failCount;

    public static void main(String[] args) {
        test(new int[] {});
        test(new int[] {1, 20});
        test(new int[] {1, 2, 30});
        test(new int[] {1, 2, 30, 40});
        test(new int[] {1, 2, 3, 40, 50});
        test(new int[] {1, 2, 3, 40, 50, 60});
        test(new int[] {1, 2, 3, 4, 50, 60, 70});
        test(new int[] {1, 2, 3, 4, 50, 60, 70, 80});
        test(new int[] {7, 1, 4, 18, 23, 0, -5, 12});

        if (failCount == 0) {
            System.out.println("passed all tests");
        } else {
            System.out.println("failed " + failCount + " of " + testCount + 
                               " tests");
        }
    }

    public static void test(int[] data) {
        Stack<Integer> s = new Stack<Integer>();
        for (int n : data) {
            s.push(n);
        }
        test(s);
    }

    public static void test(Stack<Integer> s) {
        Stack<Integer> s2 = new Stack<Integer>();
        for (int n : s) {
            s2.push(n);
        }
        System.out.println("original = " + s);
        mirrorCollapse2(s);
        System.out.println("result   = " + s);
        boolean fail = false;
        try {
            mirrorCollapse(s2);
        } catch (RuntimeException e) {
            int line = e.getStackTrace()[2].getLineNumber();
            System.out.println("    threw " + e + " at line #" + line);
            fail = true;
        }
        if (!fail && !s.equals(s2)) {
            System.out.println("yours    = " + s2);
            fail = true;
        }
        testCount++;
        if (fail) {
            System.out.println("failed");
            failCount++;
        } else {
            System.out.println("passed");
        }
        System.out.println();
    }
}