import numpy as np

file = "inputs/day5.input"
numbers = open(file, "rb").readlines()
numbers = [x.decode().replace("\n", "").split(" ") for x in numbers]
start_x = [int(x[0].split(",")[0]) for x in numbers]
end_x = [int(x[2].split(",")[0]) for x in numbers]
start_y = [int(x[0].split(",")[1]) for x in numbers]
end_y = [int(x[2].split(",")[1]) for x in numbers]
max_val = max(max(end_x), max(end_y))

vents = np.zeros((max_val + 1, max_val + 1))


def draw_diagonal(mat, x1, x2, y1, y2):
    length = abs(x2 - x1)
    if x1 < x2:
        xincr = 1
    else:
        xincr = -1
    if y1 < y2:
        yincr = 1
    else:
        yincr = -1
    for i in range(length + 1):
        mat[y1 + i * yincr, x1 + i * xincr] += 1
    return mat


for i in range(len(start_x)):
    if start_y[i] < end_y[i]:
        y1 = start_y[i]
        y2 = end_y[i]
    else:
        y1 = end_y[i]
        y2 = start_y[i]
    if start_x[i] < end_x[i]:
        x1 = start_x[i]
        x2 = end_x[i]
    else:
        x1 = end_x[i]
        x2 = start_x[i]
    if start_x[i] == end_x[i]:
        vents[y1 : y2 + 1, start_x[i]] += 1
    elif start_y[i] == end_y[i]:
        vents[start_y[i], x1 : x2 + 1] += 1
    else:
        vents = draw_diagonal(vents, start_x[i], end_x[i], start_y[i], end_y[i])

print(len(vents[vents >= 2]))