Combinatorics

The mathematics of counting objects.

ID	Title	Solved By	Correct Ratio
FIB	Rabbits and Recurrence Relations	35253
FIBD	Mortal Fibonacci Rabbits	14298
MRNA	Inferring mRNA from Protein	10978
ORF	Open Reading Frames	8409
PERM	Enumerating Gene Orders	14191
PMCH	Perfect Matchings and RNA Secondary Structures	4099
PPER	Partial Permutations	5369
SIGN	Enumerating Oriented Gene Orderings	5025
CAT	Catalan Numbers and RNA Secondary Structures	1678
INOD	Counting Phylogenetic Ancestors	3373
MMCH	Maximum Matchings and RNA Secondary Structures	1917
REAR	Reversal Distance	1265
SSET	Counting Subsets	3055
ASPC	Introduction to Alternative Splicing	1950
MOTZ	Motzkin Numbers and RNA Secondary Structures	1037
SORT	Sorting by Reversals	948
RNAS	Wobble Bonding and RNA Secondary Structures	700
CTEA	Counting Optimal Alignments	521
CUNR	Counting Unrooted Binary Trees	463
CNTQ	Counting Quartets	263
EUBT	Enumerating Unrooted Binary Trees	246
ROOT	Counting Rooted Binary Trees	346