Combinatorics

The mathematics of counting objects.

ID	Title	Solved By	Correct Ratio
FIB	Rabbits and Recurrence Relations	37107
FIBD	Mortal Fibonacci Rabbits	14956
MRNA	Inferring mRNA from Protein	11443
ORF	Open Reading Frames	8785
PERM	Enumerating Gene Orders	14678
PMCH	Perfect Matchings and RNA Secondary Structures	4290
PPER	Partial Permutations	5582
SIGN	Enumerating Oriented Gene Orderings	5221
CAT	Catalan Numbers and RNA Secondary Structures	1786
INOD	Counting Phylogenetic Ancestors	3491
MMCH	Maximum Matchings and RNA Secondary Structures	2010
REAR	Reversal Distance	1339
SSET	Counting Subsets	3158
ASPC	Introduction to Alternative Splicing	2033
MOTZ	Motzkin Numbers and RNA Secondary Structures	1106
SORT	Sorting by Reversals	1004
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