Combinatorics

The mathematics of counting objects.

ID	Title	Solved By	Correct Ratio
FIB	Rabbits and Recurrence Relations	31046
FIBD	Mortal Fibonacci Rabbits	12707
MRNA	Inferring mRNA from Protein	9783
ORF	Open Reading Frames	7457
PERM	Enumerating Gene Orders	12867
PMCH	Perfect Matchings and RNA Secondary Structures	3605
PPER	Partial Permutations	4821
SIGN	Enumerating Oriented Gene Orderings	4578
CAT	Catalan Numbers and RNA Secondary Structures	1466
INOD	Counting Phylogenetic Ancestors	3019
MMCH	Maximum Matchings and RNA Secondary Structures	1715
REAR	Reversal Distance	1151
SSET	Counting Subsets	2771
ASPC	Introduction to Alternative Splicing	1770
MOTZ	Motzkin Numbers and RNA Secondary Structures	914
SORT	Sorting by Reversals	865
RNAS	Wobble Bonding and RNA Secondary Structures	629
CTEA	Counting Optimal Alignments	440
CUNR	Counting Unrooted Binary Trees	416
CNTQ	Counting Quartets	234
EUBT	Enumerating Unrooted Binary Trees	220
ROOT	Counting Rooted Binary Trees	316