#!/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()]

height = len(lines)
width = len(lines[0])

visited: set[tuple[int, int]] = set()

directions = [
    (0, 1),
    (0, -1),
    (1, 0),
    (-1, 0),
]


def get_region(
    pos: tuple[int, int], region: set[tuple[int, int]]
) -> set[tuple[int, int]]:
    region.add(pos)
    i, j = pos
    ochar = lines[i][j]
    for direction in directions:
        i, j = pos[0] + direction[0], pos[1] + direction[1]
        if i not in range(height) or j not in range(width):
            continue
        if (i, j) in region:
            continue
        char = lines[i][j]
        if char != ochar:
            continue
        region |= get_region((i, j), region)
    return region


def get_perimeter(region: set[tuple[int, int]]) -> int:
    peri = 0
    for axis in (0, 1):
        oaxis = 0 if axis else 1
        iss = set([pos[axis] for pos in region])
        print(47, iss, peri)
        for i in iss:
            line = [pos[oaxis] for pos in region if pos[axis] == i]
            line.sort()
            last_j = None
            for j in line:
                if last_j is None:
                    peri += 1
                elif last_j == j - 1:
                    pass
                else:
                    peri += 2
                last_j = j
            if last_j is not None:
                peri += 1
            print(62, i, peri, line)
    return peri


tprice = 0
for i in range(height):
    for j in range(width):
        pos = i, j
        if pos in visited:
            continue
        region = get_region(pos, set())
        visited |= region

        area = len(region)
        peri = get_perimeter(region)
        price = area * peri
        tprice += price

        char = lines[i][j]
        print(f"{char}: {area} × {peri} = {price}$")

print(tprice)