Combinatorics

The mathematics of counting objects.

ID	Title	Solved By	Correct Ratio
FIB	Rabbits and Recurrence Relations	35382
FIBD	Mortal Fibonacci Rabbits	14350
MRNA	Inferring mRNA from Protein	11022
ORF	Open Reading Frames	8443
PERM	Enumerating Gene Orders	14231
PMCH	Perfect Matchings and RNA Secondary Structures	4114
PPER	Partial Permutations	5388
SIGN	Enumerating Oriented Gene Orderings	5042
CAT	Catalan Numbers and RNA Secondary Structures	1686
INOD	Counting Phylogenetic Ancestors	3385
MMCH	Maximum Matchings and RNA Secondary Structures	1923
REAR	Reversal Distance	1271
SSET	Counting Subsets	3064
ASPC	Introduction to Alternative Splicing	1955
MOTZ	Motzkin Numbers and RNA Secondary Structures	1040
SORT	Sorting by Reversals	953
RNAS	Wobble Bonding and RNA Secondary Structures	702
CTEA	Counting Optimal Alignments	522
CUNR	Counting Unrooted Binary Trees	465
CNTQ	Counting Quartets	264
EUBT	Enumerating Unrooted Binary Trees	248
ROOT	Counting Rooted Binary Trees	347