#!/usr/bin/env python3

import sys

input_file = sys.argv[1]

with open(input_file) as fd:
    lines = [line.rstrip() for line in fd.readlines()]

coords = tuple[int, int]

pos: coords
box = list()
moves: list[coords] = list()

directions = {
    "^": (-1, 0),  # ^
    ">": (0, 1),  # >
    "v": (1, 0),  # v
    "<": (0, -1),  # <
}

boxing = True
for i, line in enumerate(lines):
    if not line:
        boxing = False
    elif boxing:
        bline = list(line)
        if "@" in bline:
            j = bline.index("@")
            pos = i, j
            # bline[j] = "."
        box.append(bline)
    else:
        for c in line:
            direction = directions[c]
            moves.append(direction)


def print_box() -> None:
    for bline in box:
        print("".join(bline))
    print()


print_box()
for move in moves:
    first = pos[0] + move[0], pos[1] + move[1]
    last = first
    possible = True
    while True:
        c = box[last[0]][last[1]]
        # print(c)
        if c == ".":
            break
        elif c == "#":
            possible = False
            break
        last = last[0] + move[0], last[1] + move[1]
    if possible:
        if first != last:
            box[last[0]][last[1]] = "O"
        box[pos[0]][pos[1]] = "."
        box[first[0]][first[1]] = "@"
        pos = first
    print(move, possible, pos, first, last)
    print_box()


score = 0
for i, bline in enumerate(box):
    for j, char in enumerate(bline):
        if char == "O":
            score += 100 * i + j
print(score)