ID NAME QUALITY USERS ACC % DIFFICULTY C I
32439 Ada and Bloom   1 55
9
26
28451 Ada and Cities   10 142
19
17
28450 Ada and Path   8 103
15
28
4206 Fast Maximum Matching   30 1987
22
19
660 Dungeon of Death   14 1346
13
26
3111 Stabards   3 160
12
23
377 Taxi   14 1237
13
16
26663 Theater shade in Berland   1 25
34
17

#matching

A matching (independent edge set) on a graph is a set of edges such that no two edges share a vertex in common

https://en.wikipedia.org/wiki/Matching_(graph_theory) http://mathworld.wolfram.com/PerfectMatching.html https://en.wikipedia.org/wiki/K%C3%B6nig%27s_theorem_(graph_theory)