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- #!/usr/bin/env python3
- def gen(start):
- yield from start
- spoken = {n: i for i, n in enumerate(start)}
- i = len(start)
- num = 0
- while True:
- yield num
- nextnum = i - spoken.get(num, i)
- spoken[num] = i
- num = nextnum
- i += 1
- def nth(start, n):
- return next(num for i, num in enumerate(gen(start)) if i == n - 1)
- start = [13, 0, 10, 12, 1, 5, 8]
- print(nth(start, 2020))
- print(nth(start, 30000000))
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