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Encode an int into a compact string representation using an arbitrary alphabet
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| # works on any integer N where N > 0 | |
| def int_to_string(n): | |
| alphabet = "0123456789abcdefghijklmnopqrstuvwxyz" | |
| if n == 0: | |
| return "" | |
| else: | |
| return int_to_string(n // len(alphabet)) + alphabet[n % len(alphabet)] |
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