The disjoint cliques problem for complete graphs.
35005
Difficult variation of the committee problem
63379
Enumerate non-isomorphic graphs on n vertices
45514
Friendly graph partitioning
121575
Meet-in-the-middle with checking complexity
107899
counting full bipartite matchings
33603
How to get all Perfect or Near-Perfect Matchings of a graph
128034
Problem on Extremal Graphs: three independent paths
38700
the Nordhaus-Gaddum problems for chromatic number of graph and its complement
108417
Cycles of length k in a complete simple graph with n vertices
126543
Combinatorics problem: $n$ people line up to $m$ clubs
121402
Planar Realization of a Graph in Three-Space
107447
Clustering a fully connected graph
18980
Deleting isomorphic graphs efficiently
37754
Number of vertices of a complete graph with $n$ edges
134616
Straight-line embedding planar graph
68801
Graph and one Sequence challenge
87431
$n-$circular arrangement problem