""" Simulate octopus flashing """

def increment(octopodes, position):
    for x in range(position[0] - 1, position[0] + 2):
        if x < 0 or x > 9:
            continue

        for y in range(position[1] - 1, position[1] + 2):
            if y < 0 or y > 9:
                continue

            octopodes[y][x] += 1


def add_one(octopodes):
    for y in range(10):
        for x in range(10):
            octopodes[y][x] += 1


def flash(octopodes):
    flashed = []

    flashed_this_iter = True
    while flashed_this_iter:
        flashed_this_iter = False
        for y in range(10):
            for x in range(10):
                if octopodes[y][x] > 9 and (x, y) not in flashed:
                    flashed_this_iter = True
                    flashed.append((x, y))
                    increment(octopodes, (x, y))

    for x, y in flashed:
        octopodes[y][x] = 0

    return len(flashed)


octopodes = []
with open("11_input.txt", "r") as f:
    for line in f:
        octopodes_in_line = []
        for char in line.strip():
            octopodes_in_line.append(int(char))

        octopodes.append(octopodes_in_line)

total_flashes = 0
for gen in range(100):
    add_one(octopodes)
    total_flashes += flash(octopodes)

print(total_flashes)