from pprint import pprint
import fileinput
import itertools
import numpy

def distance(a, b):
    ax, ay = a
    bx, by = b
    return abs(ax - bx) + abs(ay - by)

coordinates = []
for line in fileinput.input():
    x, y = line.strip().split(", ")
    coordinates.append((int(x), int(y)))
xs, ys = numpy.transpose(coordinates)

def nearest_neighbor(x, y):
    closest = -1
    dist = 10000
    for i, coord in enumerate(coordinates):
        d = distance((x, y), coord)
        if d < dist:
            closest = i
            dist = d
        elif d == dist:
            closest = -1

    return closest

def calc_farthest(padding):

    xmin, xmax = min(xs) - padding, max(xs) + padding
    ymin, ymax = min(ys) - padding, max(ys) + padding
    w, h = xmax - xmin, ymax - ymin

    grid = numpy.zeros((h + 1, w + 1), dtype=numpy.int16) - 1
    for y, row in enumerate(grid):
        for x in range(len(row)):
            nn = nearest_neighbor(x + xmin, y + ymin)
            if nn is not None:
                grid[y, x] = nn

    flat = grid.flatten()
    flat = flat[flat >= 0]

    return numpy.bincount(flat)

def part1():
    small = calc_farthest(0)
    big = calc_farthest(10)
    print(small[small == big].max())

def part2():
    padding = 5
    max_dist = 10000

    xmin, xmax = min(xs) - padding, max(xs) + padding
    ymin, ymax = min(ys) - padding, max(ys) + padding
    w, h = xmax - xmin, ymax - ymin

    grid = numpy.zeros((h + 1, w + 1), dtype=numpy.int16) - 1
    size = 0
    for y, row in enumerate(grid):
        for x in range(len(row)):
            s = sum(distance((x + xmin, y + ymin), c) for c in coordinates)
            if s < max_dist:
                size += 1

    print(size)