with open('input.txt', 'r') as f:
    puzzle = f.read()

directions = list(puzzle)

santa_x = 0
santa_y = 0

robo_santa_x = 0
robo_santa_y = 0

houses = {
    0: {
        0: {
            'presents': 1
        }
    }
}

house_count = 1

loop_iter = 1

for direction in directions:
    if loop_iter % 2 == 0:
        if direction == '>':
            robo_santa_x += 1

        elif direction == '<':
            robo_santa_x -= 1

        elif direction == '^':
            robo_santa_y += 1

        elif direction == 'v':
            robo_santa_y -= 1

        if robo_santa_x not in houses:
            houses.update({
                robo_santa_x: {
                    robo_santa_y: {
                        'presents': 1
                    }
                }
            })

            house_count += 1

        elif robo_santa_y not in houses[robo_santa_x]:
            houses[robo_santa_x].update({
                robo_santa_y: {
                    'presents': 1
                }
            })

            house_count += 1

        else:
            houses[robo_santa_x][robo_santa_y]['presents'] += 1

    else:
        if direction == '>':
            santa_x += 1

        elif direction == '<':
            santa_x -= 1

        elif direction == '^':
            santa_y += 1

        elif direction == 'v':
            santa_y -= 1

        if santa_x not in houses:
            houses.update({
                santa_x: {
                    santa_y: {
                        'presents': 1
                    }
                }
            })

            house_count += 1

        elif santa_y not in houses[santa_x]:
            houses[santa_x].update({
                santa_y: {
                    'presents': 1
                }
            })

            house_count += 1

        else:
            houses[santa_x][santa_y]['presents'] += 1

    loop_iter += 1

print(house_count)