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Problems
Combinatorics
The mathematics of counting objects.
ID
Title
Solved By
Correct Ratio
FIB
Rabbits and Recurrence Relations
32398
FIBD
Mortal Fibonacci Rabbits
13255
MRNA
Inferring mRNA from Protein
10234
ORF
Open Reading Frames
7780
PERM
Enumerating Gene Orders
13340
PMCH
Perfect Matchings and RNA Secondary Structures
3797
PPER
Partial Permutations
5049
SIGN
Enumerating Oriented Gene Orderings
4750
CAT
Catalan Numbers and RNA Secondary Structures
1542
INOD
Counting Phylogenetic Ancestors
3138
MMCH
Maximum Matchings and RNA Secondary Structures
1787
REAR
Reversal Distance
1193
SSET
Counting Subsets
2879
ASPC
Introduction to Alternative Splicing
1835
MOTZ
Motzkin Numbers and RNA Secondary Structures
960
SORT
Sorting by Reversals
901
RNAS
Wobble Bonding and RNA Secondary Structures
655
CTEA
Counting Optimal Alignments
463
CUNR
Counting Unrooted Binary Trees
434
CNTQ
Counting Quartets
243
EUBT
Enumerating Unrooted Binary Trees
229
ROOT
Counting Rooted Binary Trees
327
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