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FAQs

Q: Why I passed all samples, but still get Wrong Answer (WA) ?

  • There are multiple secret test cases; in classic rules, failing on any of them causes Wrong Answer, so you will have to spot the bug by yourself. See more in common reasons for WA.

Q: What is Time Limit Exceeded (TLE) ?

  • Your program runs out of time limit; this error doesn't allow you to know if your program would reach the correct solution to the problem or not.

Q: What is Memory Limit Exceeded (MLE)

  • Your program tried to use more memory than the judge allows.

Q: What is Runtime Error (RE)

  • Your program failed during the execution (segmentation fault, floating point exception...). The exact cause is not reported to the user to avoid hacking.

Q: There are Input file: standard input, Output file: standard output in my problem statement, what do these mean? Do I need to create files?

  • Reading from standard input (stdin) means reading data which you are typing on your keyboard, and outputting to standard output (stdout) means printing data to your console. So it's not necessary to create files.