Problems
 
 
# Name    
1
standard input/output
1 s, 256 MB
Submit  x17
2
standard input/output
1 s, 256 MB
Submit  x9
3
standard input/output
1 s, 256 MB
Submit  x39
4
standard input/output
1 s, 256 MB
Submit  x11
5
standard input/output
1.5 s, 256 MB
Submit  x15
6
standard input/output
1 s, 256 MB
Submit  x3
Complete problemset
 
 
 
 
Questions about problems
 
 
  Question Answer
2026-09-11 20:06:37
Problem 1. Confusion Matrix
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Announcement
An error in Problem 1 has been corrected. The problem statement has also been slightly modified (a requirement to round to three decimal places has been added, as one of the answers has a non-terminating decimal part). The solutions have been rechecked.