949.Largest Time For Given Digits
949.Largest Time For Given Digits
难度:Easy
Given an array of 4 digits, return the largest 24 hour time that can be made.
The smallest 24 hour time is 00:00, and the largest is 23:59. Starting from 00:00, a time is larger if more time has elapsed since midnight.
Return the answer as a string of length 5. If no valid time can be made, return an empty string.
暴力解法,列出四个数字的全排列,然后比较有效的最大值。
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