02. Fishing Competition

def directions(position, direction, rows):
    row, col = position
    if direction == "up":
        row = (row - 1) % rows
    elif direction == "down":
        row = (row + 1) % rows
    elif direction == "left":
        col = (col - 1) % rows
    elif direction == "right":
        col = (col + 1) % rows

    return row, col


def print_matrix(matrix):
    for row in matrix:
        print("".join(row))


rows = int(input())
fishing_area = []
captain, whirlpool, empty, passage, quota = "S", "W", "-", 0, 20
position = None

for row_ in range(rows):
    line = list(input())
    if captain in line:
        position = (row_, line.index(captain))
    fishing_area.append(line)

direction = input()

while direction != "collect the nets":
    new_position = directions(position, direction, rows)
    n_row, n_col = new_position

    step = fishing_area[n_row][n_col]

    if step.isdigit():
        passage += int(step)

    if step == whirlpool:
        passage = 0
        print(f"You fell into a whirlpool! The ship sank and you lost the fish you caught. "
              f"Last coordinates of the ship: [{n_row},{n_col}]")
        exit()

    fishing_area[position[0]][position[1]] = empty
    fishing_area[n_row][n_col] = captain
    position = new_position
    direction = input()

if passage >= quota:
    print(f"Success! You managed to reach the quota!")
else:
    print(f"You didn't catch enough fish and didn't reach the quota! You need {quota - passage} tons of fish more.")

print(f"Amount of fish caught: {passage} tons.")

print_matrix(fishing_area)