Combinatorics

The mathematics of counting objects.

ID	Title	Solved By	Correct Ratio
FIB	Rabbits and Recurrence Relations	29548
FIBD	Mortal Fibonacci Rabbits	12191
MRNA	Inferring mRNA from Protein	9367
ORF	Open Reading Frames	7181
PERM	Enumerating Gene Orders	12379
PMCH	Perfect Matchings and RNA Secondary Structures	3454
PPER	Partial Permutations	4625
SIGN	Enumerating Oriented Gene Orderings	4425
CAT	Catalan Numbers and RNA Secondary Structures	1410
INOD	Counting Phylogenetic Ancestors	2889
MMCH	Maximum Matchings and RNA Secondary Structures	1661
REAR	Reversal Distance	1119
SSET	Counting Subsets	2660
ASPC	Introduction to Alternative Splicing	1713
MOTZ	Motzkin Numbers and RNA Secondary Structures	884
SORT	Sorting by Reversals	843
RNAS	Wobble Bonding and RNA Secondary Structures	615
CTEA	Counting Optimal Alignments	429
CUNR	Counting Unrooted Binary Trees	386
CNTQ	Counting Quartets	227
EUBT	Enumerating Unrooted Binary Trees	199
ROOT	Counting Rooted Binary Trees	309