Combinatorics

The mathematics of counting objects.

ID	Title	Solved By	Correct Ratio
FIB	Rabbits and Recurrence Relations	36210
FIBD	Mortal Fibonacci Rabbits	14653
MRNA	Inferring mRNA from Protein	11259
ORF	Open Reading Frames	8618
PERM	Enumerating Gene Orders	14469
PMCH	Perfect Matchings and RNA Secondary Structures	4206
PPER	Partial Permutations	5495
SIGN	Enumerating Oriented Gene Orderings	5146
CAT	Catalan Numbers and RNA Secondary Structures	1740
INOD	Counting Phylogenetic Ancestors	3443
MMCH	Maximum Matchings and RNA Secondary Structures	1970
REAR	Reversal Distance	1309
SSET	Counting Subsets	3118
ASPC	Introduction to Alternative Splicing	1998
MOTZ	Motzkin Numbers and RNA Secondary Structures	1077
SORT	Sorting by Reversals	979
RNAS	Wobble Bonding and RNA Secondary Structures	731
CTEA	Counting Optimal Alignments	546
CUNR	Counting Unrooted Binary Trees	483
CNTQ	Counting Quartets	275
EUBT	Enumerating Unrooted Binary Trees	262
ROOT	Counting Rooted Binary Trees	359