Combinatorics

The mathematics of counting objects.

ID	Title	Solved By	Correct Ratio
FIB	Rabbits and Recurrence Relations	36650
FIBD	Mortal Fibonacci Rabbits	14813
MRNA	Inferring mRNA from Protein	11369
ORF	Open Reading Frames	8719
PERM	Enumerating Gene Orders	14588
PMCH	Perfect Matchings and RNA Secondary Structures	4254
PPER	Partial Permutations	5536
SIGN	Enumerating Oriented Gene Orderings	5185
CAT	Catalan Numbers and RNA Secondary Structures	1768
INOD	Counting Phylogenetic Ancestors	3469
MMCH	Maximum Matchings and RNA Secondary Structures	1994
REAR	Reversal Distance	1326
SSET	Counting Subsets	3142
ASPC	Introduction to Alternative Splicing	2017
MOTZ	Motzkin Numbers and RNA Secondary Structures	1095
SORT	Sorting by Reversals	993
RNAS	Wobble Bonding and RNA Secondary Structures	743
CTEA	Counting Optimal Alignments	558
CUNR	Counting Unrooted Binary Trees	491
CNTQ	Counting Quartets	283
EUBT	Enumerating Unrooted Binary Trees	270
ROOT	Counting Rooted Binary Trees	366