Staircase

Staircase

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比较简单的问题Beat the previous 要求你从给定的digits 数列中贪婪地提取一个严格升序的整数序列。例如,对于digits 等于"31415926" ,列表 。 (list)返回的整数应为[3, 14, 15, 92] ,最后一个原始数字未使用。

与直觉有些相悖的是,随意跳过某些digits 的能力可能会使结果中的 list的整数包含的元素可能会多于之前以贪婪方式构建的列表。有了这种额外的自由度,数字字符串"31415926" 的示例将允许结果[3, 4, 5, 9, 26] 比贪心构建的解决方案多一个元素。

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