python练习实例1--------给定数字组成三位数
题目：有四个数字：1、2、3、4，能组成多少个互不相同且无重复数字的三位数？各是多少？ 来看第一种解法 这种解法时间复杂度为O(n2), 其中的列表可以换成range生成器 以上两种解法都可以改成列表推导式的形式，如下，这种形式看上去简洁，但如果出错了排查 ...
原文：[LeetCode] 949. Largest Time for Given Digits 由给定数字组成的最大时间
Given an array of digits, return the largest hour time that can be made. The smallest hour time is : , and the largest is : . Starting from : , a time is larger if more time has elapsed since midnigh ...
2020-06-14 03:29 0 1251 推荐指数：
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