Combinatorics

The mathematics of counting objects.

ID	Title	Solved By	Correct Ratio
FIB	Rabbits and Recurrence Relations	33032
FIBD	Mortal Fibonacci Rabbits	13473
MRNA	Inferring mRNA from Protein	10406
ORF	Open Reading Frames	7916
PERM	Enumerating Gene Orders	13543
PMCH	Perfect Matchings and RNA Secondary Structures	3861
PPER	Partial Permutations	5133
SIGN	Enumerating Oriented Gene Orderings	4825
CAT	Catalan Numbers and RNA Secondary Structures	1568
INOD	Counting Phylogenetic Ancestors	3186
MMCH	Maximum Matchings and RNA Secondary Structures	1820
REAR	Reversal Distance	1212
SSET	Counting Subsets	2926
ASPC	Introduction to Alternative Splicing	1869
MOTZ	Motzkin Numbers and RNA Secondary Structures	976
SORT	Sorting by Reversals	911
RNAS	Wobble Bonding and RNA Secondary Structures	662
CTEA	Counting Optimal Alignments	496
CUNR	Counting Unrooted Binary Trees	438
CNTQ	Counting Quartets	246
EUBT	Enumerating Unrooted Binary Trees	230
ROOT	Counting Rooted Binary Trees	331