Combinatorics

The mathematics of counting objects.

ID	Title	Solved By	Correct Ratio
FIB	Rabbits and Recurrence Relations	35107
FIBD	Mortal Fibonacci Rabbits	14231
MRNA	Inferring mRNA from Protein	10945
ORF	Open Reading Frames	8377
PERM	Enumerating Gene Orders	14152
PMCH	Perfect Matchings and RNA Secondary Structures	4077
PPER	Partial Permutations	5358
SIGN	Enumerating Oriented Gene Orderings	5010
CAT	Catalan Numbers and RNA Secondary Structures	1672
INOD	Counting Phylogenetic Ancestors	3351
MMCH	Maximum Matchings and RNA Secondary Structures	1912
REAR	Reversal Distance	1261
SSET	Counting Subsets	3051
ASPC	Introduction to Alternative Splicing	1944
MOTZ	Motzkin Numbers and RNA Secondary Structures	1034
SORT	Sorting by Reversals	945
RNAS	Wobble Bonding and RNA Secondary Structures	698
CTEA	Counting Optimal Alignments	519
CUNR	Counting Unrooted Binary Trees	461
CNTQ	Counting Quartets	262
EUBT	Enumerating Unrooted Binary Trees	245
ROOT	Counting Rooted Binary Trees	345