Combinatorics

The mathematics of counting objects.

ID	Title	Solved By	Correct Ratio
FIB	Rabbits and Recurrence Relations	36964
FIBD	Mortal Fibonacci Rabbits	14906
MRNA	Inferring mRNA from Protein	11425
ORF	Open Reading Frames	8768
PERM	Enumerating Gene Orders	14650
PMCH	Perfect Matchings and RNA Secondary Structures	4281
PPER	Partial Permutations	5569
SIGN	Enumerating Oriented Gene Orderings	5210
CAT	Catalan Numbers and RNA Secondary Structures	1781
INOD	Counting Phylogenetic Ancestors	3483
MMCH	Maximum Matchings and RNA Secondary Structures	2004
REAR	Reversal Distance	1333
SSET	Counting Subsets	3154
ASPC	Introduction to Alternative Splicing	2030
MOTZ	Motzkin Numbers and RNA Secondary Structures	1104
SORT	Sorting by Reversals	1000
RNAS	Wobble Bonding and RNA Secondary Structures	753
CTEA	Counting Optimal Alignments	563
CUNR	Counting Unrooted Binary Trees	496
CNTQ	Counting Quartets	287
EUBT	Enumerating Unrooted Binary Trees	275
ROOT	Counting Rooted Binary Trees	370