width = int(input(""))
height = int(input(""))
num_strokes = int(input(""))

rows = [0] * width
columns = [0] * height

for stroke in range(num_strokes):
    target, number = input("").split(" ")

    if target == "C":
        for i in range(height):
            print(i, int(number))
            cells[i][int(number)-1] = not cells[i][int(number)-1]
            print(cells)
    else:
        for i in range(width):
            print(i, int(number))
            cells[int(number)-1][i] = not cells[int(number)-1][i]
            print(cells)

total = 0
for row in cells:
    for cell in row:
        if cell:
            total += 1

print(total)