Combinatorics

The mathematics of counting objects.

ID	Title	Solved By	Correct Ratio
FIB	Rabbits and Recurrence Relations	34325
FIBD	Mortal Fibonacci Rabbits	13987
MRNA	Inferring mRNA from Protein	10761
ORF	Open Reading Frames	8185
PERM	Enumerating Gene Orders	13932
PMCH	Perfect Matchings and RNA Secondary Structures	4004
PPER	Partial Permutations	5289
SIGN	Enumerating Oriented Gene Orderings	4955
CAT	Catalan Numbers and RNA Secondary Structures	1640
INOD	Counting Phylogenetic Ancestors	3293
MMCH	Maximum Matchings and RNA Secondary Structures	1884
REAR	Reversal Distance	1246
SSET	Counting Subsets	3013
ASPC	Introduction to Alternative Splicing	1919
MOTZ	Motzkin Numbers and RNA Secondary Structures	1011
SORT	Sorting by Reversals	930
RNAS	Wobble Bonding and RNA Secondary Structures	684
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