"""Find the dangerous vents"""
import numpy as np

vent_field = np.zeros((1000, 1000))

with open("5_input.txt") as f:
    for line in f:
        p1, p2 = line.split("->")
        x1, y1, x2, y2 = [int(x) for x in p1.split(",") + p2.split(",")]

        if x1 == x2:
            for y in range(min(y1, y2), max(y1, y2) + 1):
                vent_field[x1][y] += 1
        elif y1 == y2:
            for x in range(min(x1, x2), max(x1, x2) + 1):
                vent_field[x][y1] += 1
        else:
            m = (y2 - y1) // (x2 - x1)
            c = y1 - (m * x1)
            for x in range(min(x1, x2), max(x1, x2) + 1):
                y = (m * x) + c
                vent_field[x][y] += 1



print(len(np.argwhere(vent_field > 1)))