#!/usr/bin/python3
import fileinput

x = 1
cycle = 0
total = 0

def tick():
	global cycle, total
	cycle += 1
	if cycle in (20, 60, 100, 140, 180, 220):
		total += (cycle * x)

for line in fileinput.input():
	line = line.rstrip()
	if line == 'noop':
		tick()
	else:
		_, addx = line.split(' ')
		tick()
		tick()
		x += int(addx)

print(total)