t=0;x=0;y=0;
while (y <= 322) {
    t += s[y][x] == "#"
    y += 1;
    x += 7;
}

def advent3a(data,dx=3,dy=1):
    data = data.splitlines()
    x = y = 0
    trees = 0
    while y < len(data):
        if data[y][x%len(data[y])] == "#":
            trees += 1
        x += dx
        y += dy
    return trees
def advent3b(data):
    z=1
    for deltas in ((1, 1), (3, 1), (5, 1), (7, 1), (1, 2)):
        z *= advent3a(data, *deltas)
    return z

from itertools import *
from string import *
from math import *

i = open("input.txt").readlines()
i = [l.strip("\n") * len(i) for l in i]
o = 0
B = []

slopes = [(1, 1), (3, 1), (5, 1),  (7, 1), (1, 2)]

for slo in slopes:
    row = 0
    x = 0
    o = 0

    while row < len(i):
        if i[row][x] == "#":
            o += 1
        x += slo[0]
        row += slo[1]

    B.append(o)

f = B[0]
for m in B[1:]:
    f *= m

print(f)

      ↑⊃¨,/¨2/¨⊂¨'|'(≠⊆⊢)a
.........###......#...#.......#.........###......#...#.......#
.#.#...........#..#..#..........#.#...........#..#..#.........
#.......#.................#....#.......#.................#....

┌───┬───┬───┬────┬────┬────┬────┬────┬────┬─────┬─────┬─────┬─────┬─────┬─────┬
│3 1│6 2│9 3│12 4│15 5│18 6│21 7│24 8│27 9│30 10│33 11│36 12│39 13│42 14│45 15│
└───┴───┴───┴────┴────┴────┴────┴────┴────┴─────┴─────┴─────┴─────┴─────┴─────┴