Combinatorics

The mathematics of counting objects.

ID	Title	Solved By	Correct Ratio
FIB	Rabbits and Recurrence Relations	36943
FIBD	Mortal Fibonacci Rabbits	14902
MRNA	Inferring mRNA from Protein	11421
ORF	Open Reading Frames	8764
PERM	Enumerating Gene Orders	14645
PMCH	Perfect Matchings and RNA Secondary Structures	4279
PPER	Partial Permutations	5567
SIGN	Enumerating Oriented Gene Orderings	5208
CAT	Catalan Numbers and RNA Secondary Structures	1780
INOD	Counting Phylogenetic Ancestors	3482
MMCH	Maximum Matchings and RNA Secondary Structures	2004
REAR	Reversal Distance	1333
SSET	Counting Subsets	3153
ASPC	Introduction to Alternative Splicing	2029
MOTZ	Motzkin Numbers and RNA Secondary Structures	1103
SORT	Sorting by Reversals	1000
RNAS	Wobble Bonding and RNA Secondary Structures	753
CTEA	Counting Optimal Alignments	563
CUNR	Counting Unrooted Binary Trees	496
CNTQ	Counting Quartets	287
EUBT	Enumerating Unrooted Binary Trees	275
ROOT	Counting Rooted Binary Trees	370