Problems
 
 
# Name    
A
standard input/output
1 s, 256 MB
Submit  x264
B
standard input/output
1 s, 256 MB
Submit  x113
C
standard input/output
5 s, 256 MB
Submit  x21
D
standard input/output
2 s, 256 MB
Submit  x43
E
standard input/output
1 s, 256 MB
Submit  x68
F
standard input/output
1 s, 256 MB
Submit  x227
G
standard input/output
1 s, 256 MB
Submit  x7
H
standard input/output
8 s, 256 MB
Submit  x1
I
standard input/output
2 s, 256 MB
Submit  x3
J
standard input/output
1 s, 256 MB
Submit  x77
K
standard input/output
3 s, 512 MB
Submit  x4
L
standard input/output
1 s, 256 MB
Submit  x334
M
standard input/output
1 s, 256 MB
Submit  x2
Complete problemset
 
 
 
 
Questions about problems
 
 
  Question Answer
2020-11-26 17:54:55
Announcement
Problem A.
*****
The link to download samples: https://ws28.cn/f/42whcbtt3po

And there is something wrong with the picture in the statement, please use the samples to solve the problem.
2020-11-26 17:52:05
Announcement
General announcement
*****
Please see the PDF statement, it is the latest version for some problems.
2020-11-19 20:23:56
Announcement
General announcement
*****
This contest was held online, 3 PCs per team were allowed, copying and pasting code was allowed, searching on the internet was allowed. Communication of a contestant with anyone other than their teammates was obviously not allowed.
2020-11-19 19:26:16
Announcement
Problem H. Prefix Sum
*****

We recommand you use 32bits compiler to submit this problem. Or you can easily AC this problem by brute fouce.