Combinatorics

The mathematics of counting objects.

ID	Title	Solved By	Correct Ratio
FIB	Rabbits and Recurrence Relations	36787
FIBD	Mortal Fibonacci Rabbits	14866
MRNA	Inferring mRNA from Protein	11394
ORF	Open Reading Frames	8739
PERM	Enumerating Gene Orders	14616
PMCH	Perfect Matchings and RNA Secondary Structures	4264
PPER	Partial Permutations	5550
SIGN	Enumerating Oriented Gene Orderings	5198
CAT	Catalan Numbers and RNA Secondary Structures	1777
INOD	Counting Phylogenetic Ancestors	3476
MMCH	Maximum Matchings and RNA Secondary Structures	1997
REAR	Reversal Distance	1330
SSET	Counting Subsets	3148
ASPC	Introduction to Alternative Splicing	2023
MOTZ	Motzkin Numbers and RNA Secondary Structures	1099
SORT	Sorting by Reversals	997
RNAS	Wobble Bonding and RNA Secondary Structures	748
CTEA	Counting Optimal Alignments	560
CUNR	Counting Unrooted Binary Trees	492
CNTQ	Counting Quartets	284
EUBT	Enumerating Unrooted Binary Trees	272
ROOT	Counting Rooted Binary Trees	367