import itertools

def spaced_to_ints(spaced_some):
    return [int(a) for a in spaced_some.split(" ")]

def order_sequence_chars(str):
    return list(str)
def count_order(order):
    return(int(order))

def get_dice():
    input_data = input().split(" ")
    items = [int(cont) for cont in input_data]
    keys = ['T', 'S', 'E', 'W', 'N', 'B']
    return dict(zip(keys, items))

def rot_dice(rot, dice):
    if rot == "N":
        keys = ['T', 'S', 'B', 'N']
        items = dice['S'], dice['B'], dice['N'], dice['T']
        new_dice = dict(zip(keys, items))
        dice.update(new_dice)

    if rot == "S":
        keys = ['T', 'S', 'B', 'N']
        items = dice['N'], dice['T'], dice['S'], dice['B']
        new_dice = dict(zip(keys, items))
        dice.update(new_dice)

    if rot == "E":
        keys = ['T', 'E', 'B', 'W']
        items = dice['W'], dice['T'], dice['E'], dice['B']
        new_dice = dict(zip(keys, items))
        dice.update(new_dice)

    if rot == "W":
        keys = ['T', 'E', 'B', 'W']
        items = dice['E'], dice['B'], dice['W'], dice['T']
        new_dice = dict(zip(keys, items))
        dice.update(new_dice)

    if rot == "R":
        keys = ['N', 'W', 'S', 'E']
        items = dice['E'], dice['N'], dice['W'], dice['S']
        new_dice = dict(zip(keys, items))
        dice.update(new_dice)

    if rot == "L":
        keys = ['N', 'W', 'S', 'E']
        items = dice['W'], dice['S'], dice['E'], dice['N']
        new_dice = dict(zip(keys, items))
        dice.update(new_dice)

def search_right_surf(conds, dice):
    a, b = conds
    a_key = [k for k, v in dice.items() if v == a]
    b_key = [k for k, v in dice.items() if v == b]
    key_list = a_key + b_key

    part_st = ''.join(key_list)

    def search(part_st):
        if part_st in "TNBST":
            return "W"

        if part_st in "TSBNT":
            return "E"

        if part_st in "TEBWT":
            return "N"

        if part_st in "TWBET":
            return "S"

        if part_st in "NESWN":
            return "B"

        if part_st in "NWSEN":
            return "T"

    target_key = search(part_st)
    print(dice[target_key])

def search_top_surf(top_surf, dice):

    dice2_surf, *_ = [k for k, v in dice.items() if v == top_surf]

    if dice2_surf == 'N':
        rot_dice("S", dice)

    if dice2_surf == 'B':
        controls = list("SS")
        for i in controls:
            rot_dice(i, dice)
    if dice2_surf == 'S':
        controls = list("N")
        for i in controls:
            rot_dice(i, dice)
    if dice2_surf == 'W':
        controls = list("E")
        for i in controls:
            rot_dice(i, dice)
    if dice2_surf == 'E':
        controls = list("W")
        for i in controls:
            rot_dice(i, dice)

def search_flont_surf(flont_surf, dice):

    dice2_surf, *_ = [k for k, v in dice.items() if v == flont_surf]

    if dice2_surf == 'E':
        controls = list("R")
        for i in controls:
            rot_dice(i, dice)

    if dice2_surf == 'S':
        controls = list("RR")
        for i in controls:
            rot_dice(i, dice)

    if dice2_surf == 'W':
        rot_dice("L", dice)

def rot_compare(dice1, dice2):

    def compare_dice(dice1, dice2):
        if dice1 == dice2:
            return True

    comb = ["N", "S", "E", "W", "R", "L"]
    tups = list()
    for i in range(6):
        tups.append(itertools.combinations(comb, i))

    if compare_dice(dice1, dice2):
        return True

    for commands in itertools.chain.from_iterable(tups):
        for command in commands:
            rot_dice(command, dice2)
            if compare_dice(dice1, dice2):
                return True
    return False

def compare_many_dices(dice_list):
    dice1 = dice_list.pop(0)
    for dice2 in dice_list:
        if rot_compare(dice1, dice2):
            return True
    return False

def q1():

    dice = get_dice()
    controls = list(input())
    for i in controls:
        rot_dice(i, dice)
    print(dice["T"])

def q2():

    dice = get_dice()
    a = input()
    repeater = int(a)

    for neee in range(repeater):
        control_input = input().split(" ")
        conds = [int(i) for i in control_input]
        search_right_surf(conds, dice)

def q3():
    dice1 = get_dice()
    dice2 = get_dice()

    if rot_compare(dice1, dice2):
        print("Yes")
    else:
        print("No")

def q4():
    inp = input()
    dice_num = int(inp)
    dice_list = list()
    for i in range(dice_num):
        dice_list.append(get_dice())

    if compare_many_dices(dice_list):
        print("No")

    else:
        print("Yes")

def alds1():
    n = int(input())
    A = [int(cont) for cont in input().split(" ")]

    print(' '.join(map(str, A)))

    for _i in range(len(A)-1):
        i = _i+1
        v = A[i]
        j = i-1

        while j >= 0:
            if A[j] < v:
                break

            A[j+1] = A[j]
            A[j] = v
            j = j - 1

        print(' '.join(map(str, A)))

def itp2_1_a():
    def pushBack(li, insertion):
        li.append(insertion)

    def randomAccess(li, dist):
        print(li[dist])

    def popBack(li):
        li.pop(-1)

    def func_allocate(mylist, inp):
        # "0 x" or "1 p" or "2" given

        order, *a = spaced_to_ints(inp)
        if a:
            num = a[0]
        if order == 0:
            pushBack(mylist, num)

        if order == 1:
            randomAccess(mylist, num)

        if order == 2:
            popBack(mylist)

    mylist = list()
    count = count_order(input())

    for i in range(count):
        func_allocate(mylist, input())

itp2_1_a()




Measured memory_bytes: 13684