30 lines
700 B
Python
Executable file
30 lines
700 B
Python
Executable file
#!/usr/bin/env python
|
|
|
|
import sys
|
|
from functools import reduce
|
|
from itertools import chain, cycle
|
|
from typing import Iterable, List
|
|
|
|
|
|
def sequencer(pattern: List[int], n: int) -> Iterable[int]:
|
|
gen = cycle(list(chain(*([a] * n for a in pattern))))
|
|
next(gen) # Skip the first one
|
|
yield from gen
|
|
|
|
|
|
def main() -> None:
|
|
signal = [int(d) for d in sys.stdin.read().strip()]
|
|
base_pattern = [0, 1, 0, -1]
|
|
|
|
for __ in range(100):
|
|
signal = [
|
|
abs(sum(a * b for a, b in zip(signal, sequencer(base_pattern, i + 1)))) % 10
|
|
for i in range(len(signal))
|
|
]
|
|
|
|
print(reduce(lambda a, b: a * 10 + b, signal[0:8]))
|
|
|
|
|
|
if __name__ == "__main__":
|
|
main()
|