Problems
 
 
# Name    
A
standard input/output
1 s, 256 MB
Submit  x634
B
standard input/output
8 s, 256 MB
Submit  x172
C
standard input/output
2 s, 256 MB
Submit  x518
D
standard input/output
2 s, 256 MB
Submit  x17
E
standard input/output
3 s, 256 MB
Submit  x75
F
standard input/output
1 s, 256 MB
Submit  x568
G
standard input/output
1.5 s, 256 MB
Submit  x214
H
standard input/output
2 s, 256 MB
Submit  x21
I
standard input/output
1 s, 256 MB
Submit  x249
J
standard input/output
1 s, 256 MB
Submit  x545
K
standard input/output
3 s, 256 MB
Submit  x247
L
standard input/output
5 s, 256 MB
Submit  x17
Complete problemset
 
 
 
 
Questions about problems
 
 
  Question Answer
2018-05-26 12:18:09
Problem F. Random Sort
*****
plz , explain test 2 :
 2
 5 5 
There are 2 ways of choosing a permutation p that correctly sorts the array A in increasing order :

p = {1 , 2}  ==>  {A1 , A2} = {5 , 5}

p = {2 , 1}  ==>  {A2 , A1} = {5 , 5}