import sys
from pprint import pprint
import re
from itertools import product
from collections import defaultdict

instructions = []

with open(sys.argv[1]) as file:
    tmp = []
    for line in file:
        tmp = [re.match(r'.+?(?=\d)',line).group().strip()]
        tmp += [int(i) for i in re.findall(r'\d+',line)]
        instructions.append(tmp)

size = 1000

maps = defaultdict(bool)
#maps = [ [False]*size for i in range(size)]


for i in instructions:
    for x in product(range(i[1],i[3]+1),range(i[2],i[4]+1)):
        if i[0] == 'turn off':
            maps[x] = False
        elif i[0] == 'turn on':
            maps[x] = True
        else:
            if maps[x] == True:
                maps[x] = False
            else:
                maps[x] = True

    #for y in range(i[1],i[3]+1):
    #    for x in range(i[2],i[4]+1):
    #        if i[0] == 'turn off':
    #            maps[x][y] = False
    #        elif i[0] == 'turn on':
    #            maps[x][y] = False
    #        else:
    #            maps[x][y] = True if maps[x][y] == False else maps[x][y] == True

count = 0

for i in product(range(0,size),range(0,size)):
    if maps[i] == True:
        count += 1

print(count)