331. 12-Hour to 24-Hour Time
EasyParsing
Convert a time like 07:05:45PM to 24-hour format 19:05:45.
Input format
A single time hh:mm:ssAM or hh:mm:ssPM.
Output format
The 24-hour time.
Example 1
Input
07:05:45PM
Output
19:05:45
Example 2
Input
12:00:00AM
Output
00:00:00
Constraints
Valid time.
Read input from standard input and print the answer to standard output. Your code is judged against 5 test cases, most of them hidden.
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