import os

input = open(os.path.dirname(__file__) +
             "/input.txt", "r").readlines()

cost = {
    'noop': 1,
    'addx': 2
}

cycle = 1
l = 0
finish = len(input)
X = 1
strs = []

for l in input:
    cmd = l.split()
    for i in range(cost[cmd[0]]):
        #print(cycle, X, strs)

        if ((cycle+20) % 40) == 0:
            strenth = cycle*X
            # print(">> " + str(cycle) + " " + str(strenth))
            strs.append(strenth)
        cycle += 1
    if cmd[0] == 'addx':
        X += int(cmd[1])

print(sum(strs))