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Problems
Combinatorics
The mathematics of counting objects.
ID
Title
Solved By
Correct Ratio
FIB
Rabbits and Recurrence Relations
30764
FIBD
Mortal Fibonacci Rabbits
12601
MRNA
Inferring mRNA from Protein
9687
ORF
Open Reading Frames
7401
PERM
Enumerating Gene Orders
12765
PMCH
Perfect Matchings and RNA Secondary Structures
3564
PPER
Partial Permutations
4770
SIGN
Enumerating Oriented Gene Orderings
4539
CAT
Catalan Numbers and RNA Secondary Structures
1451
INOD
Counting Phylogenetic Ancestors
2981
MMCH
Maximum Matchings and RNA Secondary Structures
1703
REAR
Reversal Distance
1144
SSET
Counting Subsets
2746
ASPC
Introduction to Alternative Splicing
1760
MOTZ
Motzkin Numbers and RNA Secondary Structures
904
SORT
Sorting by Reversals
860
RNAS
Wobble Bonding and RNA Secondary Structures
623
CTEA
Counting Optimal Alignments
437
CUNR
Counting Unrooted Binary Trees
414
CNTQ
Counting Quartets
233
EUBT
Enumerating Unrooted Binary Trees
220
ROOT
Counting Rooted Binary Trees
315
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