Combinatorics

The mathematics of counting objects.

ID	Title	Solved By	Correct Ratio
FIB	Rabbits and Recurrence Relations	32654
FIBD	Mortal Fibonacci Rabbits	13342
MRNA	Inferring mRNA from Protein	10302
ORF	Open Reading Frames	7834
PERM	Enumerating Gene Orders	13422
PMCH	Perfect Matchings and RNA Secondary Structures	3822
PPER	Partial Permutations	5082
SIGN	Enumerating Oriented Gene Orderings	4783
CAT	Catalan Numbers and RNA Secondary Structures	1551
INOD	Counting Phylogenetic Ancestors	3155
MMCH	Maximum Matchings and RNA Secondary Structures	1797
REAR	Reversal Distance	1201
SSET	Counting Subsets	2896
ASPC	Introduction to Alternative Splicing	1848
MOTZ	Motzkin Numbers and RNA Secondary Structures	967
SORT	Sorting by Reversals	904
RNAS	Wobble Bonding and RNA Secondary Structures	658
CTEA	Counting Optimal Alignments	488
CUNR	Counting Unrooted Binary Trees	435
CNTQ	Counting Quartets	245
EUBT	Enumerating Unrooted Binary Trees	230
ROOT	Counting Rooted Binary Trees	328