python練習實例1--------給定數字組成三位數
題目：有四個數字：1、2、3、4，能組成多少個互不相同且無重復數字的三位數？各是多少？ 來看第一種解法 這種解法時間復雜度為O(n2), 其中的列表可以換成range生成器 以上兩種解法都可以改成列表推導式的形式，如下，這種形式看上去簡潔，但如果出錯了排查 ...
原文：[LeetCode] 949. Largest Time for Given Digits 由給定數字組成的最大時間
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 ...
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