Combinatorics

The mathematics of counting objects.

ID	Title	Solved By	Correct Ratio
FIB	Rabbits and Recurrence Relations	37291
FIBD	Mortal Fibonacci Rabbits	15006
MRNA	Inferring mRNA from Protein	11470
ORF	Open Reading Frames	8802
PERM	Enumerating Gene Orders	14721
PMCH	Perfect Matchings and RNA Secondary Structures	4302
PPER	Partial Permutations	5594
SIGN	Enumerating Oriented Gene Orderings	5236
CAT	Catalan Numbers and RNA Secondary Structures	1796
INOD	Counting Phylogenetic Ancestors	3501
MMCH	Maximum Matchings and RNA Secondary Structures	2020
REAR	Reversal Distance	1345
SSET	Counting Subsets	3164
ASPC	Introduction to Alternative Splicing	2039
MOTZ	Motzkin Numbers and RNA Secondary Structures	1114
SORT	Sorting by Reversals	1009
RNAS	Wobble Bonding and RNA Secondary Structures	759
CTEA	Counting Optimal Alignments	569
CUNR	Counting Unrooted Binary Trees	499
CNTQ	Counting Quartets	291
EUBT	Enumerating Unrooted Binary Trees	278
ROOT	Counting Rooted Binary Trees	373