You are given a string of length 5 called time, representing the current time on a digital clock in the format "hh:mm". The earliest possible time is "00:00" and the latest possible time is "23:59".
In the string time, the digits represented by the ? symbol are unknown, and must be replaced with a digit from 0 to 9.
Return an integer answer, the number of valid clock times that can be created by replacing every ? with a digit from 0 to 9.
\n
Example 1:
\n\n\nInput: time = "?5:00"\nOutput: 2\nExplanation: We can replace the ? with either a 0 or 1, producing "05:00" or "15:00". Note that we cannot replace it with a 2, since the time "25:00" is invalid. In total, we have two choices.\n\n\n
Example 2:
\n\n\nInput: time = "0?:0?"\nOutput: 100\nExplanation: Each ? can be replaced by any digit from 0 to 9, so we have 100 total choices.\n\n\n
Example 3:
\n\n\nInput: time = "??:??"\nOutput: 1440\nExplanation: There are 24 possible choices for the hours, and 60 possible choices for the minutes. In total, we have 24 * 60 = 1440 choices.\n\n\n
\n
Constraints:
\n\ntime is a valid string of length 5 in the format "hh:mm"."00" <= hh <= "23""00" <= mm <= "59"'?' and need to be replaced with digits from 0 to 9.Compiled with clang 11 using the latest C++ 17 standard.
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Most standard library headers are already included automatically for your convenience.
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