Combinatorics

The mathematics of counting objects.

ID	Title	Solved By	Correct Ratio
FIB	Rabbits and Recurrence Relations	28411
FIBD	Mortal Fibonacci Rabbits	11737
MRNA	Inferring mRNA from Protein	8999
ORF	Open Reading Frames	6923
PERM	Enumerating Gene Orders	11988
PMCH	Perfect Matchings and RNA Secondary Structures	3305
PPER	Partial Permutations	4455
SIGN	Enumerating Oriented Gene Orderings	4270
CAT	Catalan Numbers and RNA Secondary Structures	1326
INOD	Counting Phylogenetic Ancestors	2768
MMCH	Maximum Matchings and RNA Secondary Structures	1588
REAR	Reversal Distance	1065
SSET	Counting Subsets	2548
ASPC	Introduction to Alternative Splicing	1637
MOTZ	Motzkin Numbers and RNA Secondary Structures	833
SORT	Sorting by Reversals	801
RNAS	Wobble Bonding and RNA Secondary Structures	570
CTEA	Counting Optimal Alignments	405
CUNR	Counting Unrooted Binary Trees	355
CNTQ	Counting Quartets	211
EUBT	Enumerating Unrooted Binary Trees	188
ROOT	Counting Rooted Binary Trees	288