Combinatorics

The mathematics of counting objects.

ID	Title	Solved By	Correct Ratio
FIB	Rabbits and Recurrence Relations	32358
FIBD	Mortal Fibonacci Rabbits	13229
MRNA	Inferring mRNA from Protein	10207
ORF	Open Reading Frames	7772
PERM	Enumerating Gene Orders	13309
PMCH	Perfect Matchings and RNA Secondary Structures	3795
PPER	Partial Permutations	5047
SIGN	Enumerating Oriented Gene Orderings	4746
CAT	Catalan Numbers and RNA Secondary Structures	1542
INOD	Counting Phylogenetic Ancestors	3138
MMCH	Maximum Matchings and RNA Secondary Structures	1781
REAR	Reversal Distance	1192
SSET	Counting Subsets	2875
ASPC	Introduction to Alternative Splicing	1833
MOTZ	Motzkin Numbers and RNA Secondary Structures	960
SORT	Sorting by Reversals	900
RNAS	Wobble Bonding and RNA Secondary Structures	654
CTEA	Counting Optimal Alignments	458
CUNR	Counting Unrooted Binary Trees	432
CNTQ	Counting Quartets	243
EUBT	Enumerating Unrooted Binary Trees	229
ROOT	Counting Rooted Binary Trees	327