Samuel Enocsson
71 lines
1.6 KiB
Python
71 lines
1.6 KiB
Python
"""Day 1: Advent of Code 2025."""
|
|
|
|
import time
|
|
from aoc import read_lines, read_input
|
|
|
|
def get_pointer(dial, move, pointer):
|
|
dir = move[0]
|
|
n = int(move[1:])
|
|
if dir == 'L':
|
|
pointer = (pointer - n) % len(dial)
|
|
elif dir == 'R':
|
|
pointer = (pointer + n) % len(dial)
|
|
return dial[pointer]
|
|
|
|
def part1(data):
|
|
dial = range(100)
|
|
password = 0
|
|
pointer = 50
|
|
for line in data:
|
|
move = line.strip()
|
|
pointer = get_pointer(dial, move, pointer)
|
|
if pointer == 0:
|
|
password += 1
|
|
|
|
return password
|
|
|
|
def get_new_index(dial, move, pointer):
|
|
dir = move[0]
|
|
n = int(move[1:])
|
|
if dir == 'L':
|
|
pointer = (pointer - n)
|
|
elif dir == 'R':
|
|
pointer = (pointer + n)
|
|
return pointer
|
|
|
|
def part2(data):
|
|
dial = range(100)
|
|
password = 0
|
|
pointer = 50
|
|
for line in data:
|
|
move = line.strip()
|
|
if len(move[1:]) > 2:
|
|
n = int(move[1:][:-2])
|
|
move = move[0] + move[-2:]
|
|
password += n
|
|
|
|
idx = get_new_index(dial, move, pointer)
|
|
if pointer != 0 and (idx < 0 or idx > len(dial)):
|
|
password += 1
|
|
pointer = idx % len(dial)
|
|
if pointer == 0:
|
|
password += 1
|
|
|
|
|
|
return password
|
|
|
|
|
|
|
|
if __name__ == "__main__":
|
|
data = read_lines(1)
|
|
|
|
t0 = time.perf_counter()
|
|
p1 = part1(data)
|
|
t1 = time.perf_counter()
|
|
print(f"Part 1: {p1} ({(t1-t0)*1000:.2f} ms)")
|
|
|
|
t0 = time.perf_counter()
|
|
p2 = part2(data)
|
|
t1 = time.perf_counter()
|
|
print(f"Part 2: {p2} ({(t1-t0)*1000:.2f} ms)")
|