#!/usr/bin/env python3
import math
from functools import reduce
from itertools import count

import numpy as np

lines = list(np.array([[int(z) for z in y.split(',')] for y in x.strip().split(" -> ")]) for x in open("input.txt"))


all = reduce(lambda x, y: np.concatenate((x, y)), lines, np.array([[500, 0]]))
span = np.zeros((2, 2), dtype=int)
span[0] = np.min(all, axis=0)
span[1] = np.max(all, axis=0) + 1
print(span)
grid = np.full(tuple(span[1]-span[0]), False)

for line in lines:
    line = line-span[0]
    #print("line", line)
    for a, b in zip(line[:-1], line[1:]):
        a, b = np.min((a, b), axis=0), np.max((a, b), axis=0)
        #print("pair", a, b)
        grid[a[0]:b[0]+1, a[1]:b[1]+1] = True
        #print('\n+'.join(''.join('#' if p else '.' for p in l) for l in grid.T))

def drop():
    x, y = 500-span[0, 0], 0
    if grid[y, x]:
        return False
    while True:
        #print("Test", x-span[0, 0], y)
        if y+1 == grid.shape[1]:
            return None
        elif not grid[x, y+1]:
            y += 1
        elif x == 0:
            return None
        elif not grid[x-1, y+1]:
            x, y = x-1, y+1
        elif x+1 == grid.shape[0]:
            return None
        elif not grid[x+1, y+1]:
            x, y = x+1, y+1
        else:
            return x, y


for cnt in count():
    pos = drop()
    #print(pos)

    if pos is None:
        print("Res", cnt)
        break
    if not pos:
        print("Start is occupied!")
        break
    grid[pos] = True
print('\n'.join(''.join('#' if p else '.' for p in l) for l in grid.T))