Combinatorics

The mathematics of counting objects.

ID	Title	Solved By	Correct Ratio
FIB	Rabbits and Recurrence Relations	33426
FIBD	Mortal Fibonacci Rabbits	13637
MRNA	Inferring mRNA from Protein	10503
ORF	Open Reading Frames	7977
PERM	Enumerating Gene Orders	13647
PMCH	Perfect Matchings and RNA Secondary Structures	3902
PPER	Partial Permutations	5178
SIGN	Enumerating Oriented Gene Orderings	4861
CAT	Catalan Numbers and RNA Secondary Structures	1580
INOD	Counting Phylogenetic Ancestors	3206
MMCH	Maximum Matchings and RNA Secondary Structures	1830
REAR	Reversal Distance	1214
SSET	Counting Subsets	2943
ASPC	Introduction to Alternative Splicing	1880
MOTZ	Motzkin Numbers and RNA Secondary Structures	985
SORT	Sorting by Reversals	914
RNAS	Wobble Bonding and RNA Secondary Structures	668
CTEA	Counting Optimal Alignments	501
CUNR	Counting Unrooted Binary Trees	440
CNTQ	Counting Quartets	248
EUBT	Enumerating Unrooted Binary Trees	232
ROOT	Counting Rooted Binary Trees	333