Problems

Combinatorics

The mathematics of counting objects.

ID Title Solved By Correct Ratio
FIB Rabbits and Recurrence Relations 32998
FIBD Mortal Fibonacci Rabbits 13459
MRNA Inferring mRNA from Protein 10397
ORF Open Reading Frames 7910
PERM Enumerating Gene Orders 13535
PMCH Perfect Matchings and RNA Secondary Structures 3857
PPER Partial Permutations 5129
SIGN Enumerating Oriented Gene Orderings 4822
CAT Catalan Numbers and RNA Secondary Structures 1565
INOD Counting Phylogenetic Ancestors 3184
MMCH Maximum Matchings and RNA Secondary Structures 1818
REAR Reversal Distance 1211
SSET Counting Subsets 2924
ASPC Introduction to Alternative Splicing 1868
MOTZ Motzkin Numbers and RNA Secondary Structures 976
SORT Sorting by Reversals 911
RNAS Wobble Bonding and RNA Secondary Structures 662
CTEA Counting Optimal Alignments 496
CUNR Counting Unrooted Binary Trees 437
CNTQ Counting Quartets 246
EUBT Enumerating Unrooted Binary Trees 230
ROOT Counting Rooted Binary Trees 330

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