Combinatorics

The mathematics of counting objects.

ID	Title	Solved By	Correct Ratio
FIB	Rabbits and Recurrence Relations	34230
FIBD	Mortal Fibonacci Rabbits	13951
MRNA	Inferring mRNA from Protein	10743
ORF	Open Reading Frames	8169
PERM	Enumerating Gene Orders	13908
PMCH	Perfect Matchings and RNA Secondary Structures	3996
PPER	Partial Permutations	5282
SIGN	Enumerating Oriented Gene Orderings	4950
CAT	Catalan Numbers and RNA Secondary Structures	1636
INOD	Counting Phylogenetic Ancestors	3287
MMCH	Maximum Matchings and RNA Secondary Structures	1880
REAR	Reversal Distance	1243
SSET	Counting Subsets	3007
ASPC	Introduction to Alternative Splicing	1915
MOTZ	Motzkin Numbers and RNA Secondary Structures	1010
SORT	Sorting by Reversals	929
RNAS	Wobble Bonding and RNA Secondary Structures	682
CTEA	Counting Optimal Alignments	511
CUNR	Counting Unrooted Binary Trees	449
CNTQ	Counting Quartets	255
EUBT	Enumerating Unrooted Binary Trees	237
ROOT	Counting Rooted Binary Trees	338