Problems
 
 
# Name    
A
standard input/output
1 s, 256 MB
Submit  x128
B
standard input/output
2 s, 256 MB
Submit  x58
C
standard input/output
2 s, 256 MB
Submit  x36
D
standard input/output
1.5 s, 256 MB
Submit  x105
E
standard input/output
1 s, 256 MB
Submit  x22
F
standard input/output
2 s, 256 MB
Submit  x24
G
standard input/output
1 s, 256 MB
Submit  x107
H
standard input/output
1 s, 256 MB
Submit  x104
I
standard input/output
1 s, 256 MB
Submit  x51
J
standard input/output
1 s, 256 MB
Submit  x135
K
standard input/output
1 s, 256 MB
Submit  x36
L
standard input/output
1 s, 256 MB
Submit  x66
Complete problemset
 
 
 
 
Questions about problems
 
 
  Question Answer
2019-07-21 16:37:25
Problem A. Amsopoly Simple Version
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Announcement
All bugs in the problem statements have been fixed and re-clarified which are asked during the contest have been fixed. Virtual participants don't have to worry about anything is asked below for now.
2019-07-21 16:35:40
Problem C. Countering Terrorists
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Announcement
Tests have been strengthened, all submission have been rejudged successfully. Although, the results right after the contest was over are still kept for calculating school ranking points and awarding Certificates of Achievements for onsite participants.
2019-07-21 06:45:54
Problem K. Kostly Cueries
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Giới hạn của các số nguyên tố?
Giới hạn của các số nguyên tố trong bài toán này là 10^4.
2019-07-21 06:15:03
Problem J. Jumpity Digits
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Announcement
There was a problem in test set of problem J. All submission will be rejudged shortly.
2019-07-21 06:05:10
Problem D. Dahlia The Champion
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Announcement
To clarify: Dahlia can only Pull 'em Over once.
2019-07-21 05:04:35
Problem L. Left or Right? How about neither?
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giới hạn của A_i (1<=i<=n) là bao nhiêu?
1 <= A_i <= 10^9 for all i in range [1, n].
2019-07-21 04:49:13
Problem L. Left or Right? How about neither?
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Announcement
There's a mistake in the problem statement of problem L: One forward movement takes R units of energy, and one backward movement takes L.
2019-07-21 04:43:29
Problem I. Imitater The Potato
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Bài I ai đi trước ạ
lowie
2019-07-21 04:42:21
Problem D. Dahlia The Champion
*****
Announcement
The distance mentioned in this problem is the Euclidean Distance. Euclidean distance between two point (x1, y1) and (x2, y2) is sqrt((x1-x2)^2+(y1-y2)^2).