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Problems
Combinatorics
The mathematics of counting objects.
ID
Title
Solved By
Correct Ratio
FIB
Rabbits and Recurrence Relations
32614
FIBD
Mortal Fibonacci Rabbits
13326
MRNA
Inferring mRNA from Protein
10285
ORF
Open Reading Frames
7821
PERM
Enumerating Gene Orders
13405
PMCH
Perfect Matchings and RNA Secondary Structures
3816
PPER
Partial Permutations
5074
SIGN
Enumerating Oriented Gene Orderings
4774
CAT
Catalan Numbers and RNA Secondary Structures
1549
INOD
Counting Phylogenetic Ancestors
3152
MMCH
Maximum Matchings and RNA Secondary Structures
1793
REAR
Reversal Distance
1199
SSET
Counting Subsets
2892
ASPC
Introduction to Alternative Splicing
1844
MOTZ
Motzkin Numbers and RNA Secondary Structures
963
SORT
Sorting by Reversals
903
RNAS
Wobble Bonding and RNA Secondary Structures
656
CTEA
Counting Optimal Alignments
487
CUNR
Counting Unrooted Binary Trees
435
CNTQ
Counting Quartets
245
EUBT
Enumerating Unrooted Binary Trees
230
ROOT
Counting Rooted Binary Trees
328
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