Here is my solution to Day 3:

```
from typing import Tuple
with open('input.txt') as file:
input = file.readlines()
puzzle_input = [line.strip() for line in input]
two_d_array = []
for line in puzzle_input:
two_d_array.append([char for char in line])
horizontal_length = len(two_d_array[0])
vertical_length = len(two_d_array)
slopes = [
{"horizontal_shifts": 1, "vertical_shifts": 1},
{"horizontal_shifts": 3, "vertical_shifts": 1},
{"horizontal_shifts": 5, "vertical_shifts": 1},
{"horizontal_shifts": 7, "vertical_shifts": 1},
{"horizontal_shifts": 1, "vertical_shifts": 2},
]
def over_three_down_one(
current_row: int,
current_column: int,
horizontal_shifts: int,
vertical_shifts: int) -> Tuple[int, int]:
current_row += vertical_shifts
current_column += horizontal_shifts
if current_column > (horizontal_length - 1):
current_column = (current_column%horizontal_length)
return current_row, current_column
def traverse_slope(horizontal_shifts: int, vertical_shifts: int) -> int:
current_row = 0
current_column = 0
tree_collisions = 0
while current_row < vertical_length - 1:
current_row, current_column = over_three_down_one(
current_row,
current_column,
horizontal_shifts,
vertical_shifts)
if two_d_array[current_row][current_column] == '#':
tree_collisions += 1
return tree_collisions
answer = 1
for slope in slopes:
answer *= traverse_slope(slope['horizontal_shifts'], slope['vertical_shifts'])
print(f'Answer: {answer}')
```

You can also view my solution on my GitHub.

Did you solve it differently?

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