The $8$th and $11$th test cases in the official test data did not satisfy $0 < c$; these test cases have been manually corrected.
The $9$th test case in the official test data was incorrect; this test case has been regenerated.
QOJ.ac
QOJ
時間限制： 4 s
記憶體限制： 512 MB
總分： 100
可 Hack ✓
#3264. Meeting is Greeting
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