Combinatorics

The mathematics of counting objects.

ID	Title	Solved By	Correct Ratio
FIB	Rabbits and Recurrence Relations	35923
FIBD	Mortal Fibonacci Rabbits	14549
MRNA	Inferring mRNA from Protein	11182
ORF	Open Reading Frames	8563
PERM	Enumerating Gene Orders	14402
PMCH	Perfect Matchings and RNA Secondary Structures	4171
PPER	Partial Permutations	5460
SIGN	Enumerating Oriented Gene Orderings	5117
CAT	Catalan Numbers and RNA Secondary Structures	1720
INOD	Counting Phylogenetic Ancestors	3419
MMCH	Maximum Matchings and RNA Secondary Structures	1954
REAR	Reversal Distance	1290
SSET	Counting Subsets	3093
ASPC	Introduction to Alternative Splicing	1976
MOTZ	Motzkin Numbers and RNA Secondary Structures	1063
SORT	Sorting by Reversals	964
RNAS	Wobble Bonding and RNA Secondary Structures	718
CTEA	Counting Optimal Alignments	533
CUNR	Counting Unrooted Binary Trees	471
CNTQ	Counting Quartets	268
EUBT	Enumerating Unrooted Binary Trees	255
ROOT	Counting Rooted Binary Trees	353