Problems
 
 
# Name    
P
standard input/output
1 s, 1024 MB
Submit  x75
Q
standard input/output
1 s, 1024 MB
Submit  x192
R
standard input/output
1 s, 1024 MB
Submit  x16
S
standard input/output
1 s, 1024 MB
Submit  x177
T
standard input/output
1 s, 1024 MB
Submit  x71
U
standard input/output
20 s, 1024 MB
Submit  x11
V
standard input/output
2 s, 1024 MB
Submit  x146
W
standard input/output
5 s, 1024 MB
Submit  x156
X
standard input/output
5 s, 1024 MB
Submit  x69
Y
standard input/output
1 s, 1024 MB
Submit  x23
Z
standard input/output
1 s, 1024 MB
Submit  x224
Complete problemset
 
 
 
 
Questions about problems
 
 
  Question Answer
2023-03-19 13:39:27
Problem U. United States of Eurasia
*****
Announcement
Updated TL
2018-05-25 18:34:49
Problem U. United States of Eurasia
*****
Announcement
I'm unsure whether it's right to leave this note, but I want to stress out few things : 1. 64-bit integer operation in CF is remarkably slow. 2. We are unable to give more than 15 seconds - somehow it's banned. 3. For problem U, we originally had 20 second time limit, which runs quite comfortably in our original 64-bit machine. Now we have 15 second limit, and we also have 32-bit machine, and our model code runs in 10~11 seconds. Moral : You will need some constant optimization to solve U :/