#!/usr/bin/env python3


# start position
forward = 0
depth = 0
aim = 0

with open('input.txt', 'r') as myfile:
    for line in myfile:
        # read file line by line
        command, value = line.split(' ')
        # print('command {} value {}'.format(command, value))
        if command == 'forward':
            forward = forward + int(value)            
            if aim != 0:
                depth = depth + (aim*int(value))
                
            print('forward {} ... aim is {}'.format(int(value), aim))
                
        elif command == 'down':
            # depth = depth - int(value)
            aim = aim + int(value)
            
        elif command == 'up':
            # depth = depth + int(value)
            aim = aim - int(value)


print('forward: {} depth: {}'.format(forward, depth))
print('Submit value: {}'.format(forward * abs(depth)))