Problems
 
 
# Name    
A
standard input/output
1 s, 256 MB
Submit  x109
B
standard input/output
1 s, 256 MB
Submit  x86
C
standard input/output
2 s, 256 MB
Submit  x50
D
standard input/output
2 s, 256 MB
Submit  x22
E
standard input/output
2 s, 256 MB
Submit  x16
F
standard input/output
2 s, 256 MB
Submit  
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Questions about problems
 
 
  Question Answer
2023-06-17 20:42:00
Problem A. Easy Peasy
*****
Announcement
editorial is out! https://codeforces.me/blog/entry/115158
2023-06-17 18:55:04
Problem F. Amir and Tree
*****
Can you explain it a bit more?
Maybe this line "Suppose we have rooted the tree from a vertex such that the value of f(root)
 is minimum possible, Amir wants to know this value modulo 109+7
."
you have to find the minimum f(root) among all possible answers of f for the roots
2023-06-17 18:54:54
Problem F. Amir and Tree
*****
** sub(v) is defined as the set of vertices of subtree of v which does not include v **

is this statement correct !?
or do you mean that it's just the number of nodes that subtree v contains?
sub(v) contains all the vertices from subtree of v but it doesn't have v
2023-06-17 18:53:04
Problem C. Odd Subbarray
*****
Announcement
TL of this problem changed to 2 seconds and all the failed submissions were rejudged!