import re
from pprint import pprint
from PIL import Image

class Point:
    def __init__(self, pos, vel):
        self.pos = pos
        self.vel = vel

    def pos_at(self, sec):
        x = self.pos[0] + self.vel[0] * sec
        y = self.pos[1] + self.vel[1] * sec
        return (x, y)

    def __repr__(self):
        return f'<Point pos={self.pos} vel={self.vel}>'

def parse(point_str):
    pos = (int(point_str[10:16]), int(point_str[17:24]))
    vel = (int(point_str[36:38]), int(point_str[39:42]))
    return(Point(pos, vel))

with open('input.txt', 'r') as f:
    points = [parse(x) for x in f.readlines()]

def calc_bbox(points, sec):
    coords = [p.pos_at(sec) for p in points]

    min_x = min([x[0] for x in coords])
    min_y = min([x[1] for x in coords])
    max_x = max([x[0] for x in coords])
    max_y = max([x[1] for x in coords])
    return [(min_x, min_y), (max_x, max_y)]

def delta_from_bbox(bbox):
    return (bbox[1][0] - bbox[0][0], bbox[1][1] - bbox[0][1])


def calc_min_res():
    cur_res = 10000000000000000000
    i = 0
    while 1:
        bbox = calc_bbox(points, i)
        delta = delta_from_bbox(bbox)
        res = delta[0] * delta[1]
        if res > cur_res:
            return i - 1
        cur_res = res
        i += 1

print('Calculating min res')
i = calc_min_res()
print('Finished. Points closest at second:', i)