AP Practice Arthur Hu

/*

01. d
02. b
03. c
04. a
05. e
06. e
07. b
08. c
09. b
10. d a
11. c
12. b
13. a
14. b a
15. e
16. c
17. b a
18. e
19. a
20. a e
21. d
22. b e
23. d
24. e
25. a
26. c
27. d
28. b
29. a
30. a
31. a
32. c
33. e
34. d
35. e
36. c
37. b
38. a
39. e
40. d
*/
//1a

    int[] asdf = new int[arr.length];
    for (int i = 0, j = arr.length - 1; i < arr.length; i++, j--)
        asdf[i] = arr[j];

    for (int i = 0; i < arr.length; i++)
        arr[i] = asdf[i];

//1b

    for (int[] row: mat)
        ArrayUtil.reverseArray(row);

//1c

    int[][] asdf = new int[mat.length][];
    for (int i = 0, j = mat.length - 1; i < mat.length; i++, j--)
        asdf[i] = mat[j];

    for (int i = 0; i < mat.length; i++)
        mat[i] = asdf[i];
    this.reverseAllRows();

//2a
public List<Integer> getBlankPositions(){
    List<Integer> posList = new ArrayList<Integer>();
    for (int i = 0; i < sentence.length(); i++)
        if (sentence.substring(i, i + 1).equals(" "))
            posList.add(i);
    return posList
}
//2b
public int countWords(){
    return getBlankPositions().size() + 1;
}
//2c
public String[] getWords(){
    List<Integer> posList = getBlankPositions;
    int numWords = countWords();
    String[] wordArr = new String[numWords];
    for (int i = 0; i < numWords; i++){
        if (i == 0){
            if (posList.size() != 0)
                wordArr[i] = sentence.substring(0, posList.get(0));
            else
                wordArr[i] = sentence;
        }
        else if (i == posList.size())
            wordArr[i] = sentence.substring(posList.get(i-10));
        else
            wordArr[i] = sentence.substring(posList.get(i-1), posList.get(i))
    }
    return wordArr
}

//3a
public Player requestSlot(String playerName){
    for (int i = 0; i < slots.length; i++){
        if (slots[i] == null){
            Player p = new Player(playerName, i);
            slots[i] = p;
            return p;
        }
    }
    waitingList.add(playerName);
    return null;
}
//3b
public Player cancelAndReassignSlot(Player p) {
    int i = p.getPlayerNumber();
    if (waitingList.size() != 0) {
        slots[i] = new Player(waitingList.get(0), i);
        waitingList.remove(0);
    }
    else {
        slots[i] = null;
    }
    return slots[i];
}

//4a
public void reset() {
    if(arm.isFacingRight())
        arm.changeDirection();
    arm.moveForward(arm.getCurrentIndex());
    arm.changeDirection();
}
//4b
public int mostAcidic() {
    reset();
    int minPH = Integer.MAX_VALUE;
    int minIndex = 0;
    int index = 0;
    while (index < solutions.get(index)) {
        Solution s = solutions.get(index);
        if (s.getPH() < minPH){
            minPH = s.getPH;
            minIndex = index;
        }
        index++;
    }
    if (minPH < 7)
        return -1;
    else{
        arm.moveForward(minIndex);
        return minIndex;
    }
}