湖南大学第十四届ACM程序设计新生杯(重现赛)- FFind the AFei Numbers(数位dp)

题目连接html 题目描述 AFei loves numbers. He defines the natural number containing “520” as the AFei number, such as 1234520, 8752012 and 5201314. Now he wants to know how many AFei numbers are not greater th
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