ID NAME QUALITY USERS ACC % DIFFICULTY C I
14834 Foxlings   34 1170
18
12
15267 FRIEND CIRCLE   28 1296
13
11
18284 Petya and the Road Repairs   59 878
19
22
2731 Inventing Test Data   4 456
15
28
26193 Lost and survived   46 831
16
12
3932 Point Connection Game in a Circle   3 755
13
21
726 Promotion   24 2080
12
8
1707 Reliable Nets   4 339
28
23
71 Tree   3 451
12
9

#disjoint-set-2

A data structure that keeps track of a set of elements partitioned into a number of disjoint subsets

https://en.wikipedia.org/wiki/Disjoint-set_data_structure https://www.youtube.com/watch?v=gcmjC-OcWpI - video lecture