advent_of_code_2017_day_01.py

def get_puzzle_input(a_file_name: str) -> list[int]:
    with open('advent_of_code_2017_day_01.txt') as INFILE:
        return [int(x) for x in INFILE.readline().rstrip()]

def solve_p1(a_num_list: list[int]) -> int:
    a_l = a_num_list.copy()
    a_l.append(a_l[0])
    b_l: list[int] = [a_l[x] for x in range(len(a_l) - 1) if a_l[x] == a_l[x + 1]]
    return sum(b_l)

def solve_p2(a_num_list: list[int]) -> int:
    a_l = a_num_list.copy()
    a_l.extend(a_l)
    len_num_list = len(a_num_list)
    offset: int = len_num_list // 2

    b_l: list[int] = [a_l[x] for x in range(len_num_list) if a_l[x] == a_l[x + offset]]
    return sum(b_l)

num_list = get_puzzle_input('advent_of_code_2017_day_01.txt')

print(f'{solve_p1(num_list)=}')
print(f'{solve_p2(num_list)=}')