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unknown
python
a year ago
579 B
5
Indexable
def editor(s): result = s while ("71" in result) or ("72" in result) or ("73" in result): if "71" in result: result = result.replace("71", "227", 1) if "72" in result: result = result.replace("72", "37", 1) if "73" in result: result = result.replace("73", "17", 1) return result for n in range(1, 1000): string = "7" + "1" * (n + 1) + "2" * (n + 2) + "3" * (n + 3) result = editor(string) result_sum = sum(int(d) for d in string) if result_sum == 9 * n: print(n)
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