asda

dots = []
n = int(input())
for i in range(n):
    temp = [int(i) for i in input().split()]
    dots.append(temp)
moves = [int(i) for i in input().split()]
versh1, versh2 = map(int, input().split())
for j in moves:
    j -= 1
    len_x = 0
    len_y = 0
    dot_index_x = None
    dot_index_y = None
    dot_index = None
    temp_dot = dots[j]
    for i in range(len(dots)):
        temp = dots[i]
        if temp_dot[0] == temp[0]:
            temp_len = abs(temp_dot[1] - temp[1])
            if len_y < temp_len:
                len_y = temp_len
                dot_index_y = i
        if temp_dot[1] == temp[1]:
            temp_len = abs(temp_dot[0] - temp[0])
            if len_x < temp_len:
                len_x = temp_len
                dot_index_x = i
    if len_x == 0 and len_y == 0:
        continue
    if len_x >= len_y:
        if dots[dot_index_x][0] > dots[j][0]:
            dots[j][0] += 2 * len_x
        else:
            dots[j][0] -= 2 * len_x
    else:
        if dots[dot_index_y][1] > dots[j][1]:
            dots[j][1] += 2 * len_y
        else:
            dots[j][1] -= 2 * len_y
versh1 = dots[versh1 - 1]
versh2 = dots[versh2 - 1]
if versh1[0] == versh2[0] or versh1[1] == versh2[1]:
    print(0)
else:
    if versh1[0] > versh2[0]:
        len1 = versh1[0] - versh2[0]
    else:
        len1 = versh2[0] - versh1[0]
    if versh1[1] > versh2[1]:
        len2 = versh1[1] - versh2[1]
    else:
        len2 = versh2[1] - versh1[1]
    print(len1 * len2)