Problems

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Problems: 285 (total), users: 62865, attempts: 1043666, correct: 582807
ID Title Solved By Correct Ratio
BA10A Compute the Probability of a Hidden Path 435
BA10B Compute the Probability of an Outcome Given a Hidden Path 369
BA10C Implement the Viterbi Algorithm 229
BA10D Compute the Probability of a String Emitted by an HMM 202
BA10E Construct a Profile HMM 126
BA10F Construct a Profile HMM with Pseudocounts 116
BA10G Perform a Multiple Sequence Alignment with a Profile HMM 61
BA10H Estimate the Parameters of an HMM 82
BA10I Implement Viterbi Learning 73
BA10J Solve the Soft Decoding Problem 73
BA10K Implement Baum-Welch Learning 59
BA11A Construct the Graph of a Spectrum 105
BA11B Implement DecodingIdealSpectrum 77
BA11C Convert a Peptide into a Peptide Vector 111
BA11D Convert a Peptide Vector into a Peptide 105
BA11E Sequence a Peptide 63
BA11F Find a Highest-Scoring Peptide in a Proteome against a Spectrum 64
BA11G Implement PSMSearch 63
BA11H Compute the Size of a Spectral Dictionary 52
BA11I Compute the Probability of a Spectral Dictionary 53
BA11J Find a Highest-Scoring Modified Peptide against a Spectrum 42
BA1A Compute the Number of Times a Pattern Appears in a Text 958
BA1B Find the Most Frequent Words in a String 1120
BA1C Find the Reverse Complement of a String 1077
BA1D Find All Occurrences of a Pattern in a String 976
BA1E Find Patterns Forming Clumps in a String 766
BA1F Find a Position in a Genome Minimizing the Skew 737
BA1G Compute the Hamming Distance Between Two Strings 820
BA1H Find All Approximate Occurrences of a Pattern in a String 701
BA1I Find the Most Frequent Words with Mismatches in a String 570
BA1J Find Frequent Words with Mismatches and Reverse Complements 509
BA1K Generate the Frequency Array of a String 470
BA1L Implement PatternToNumber 530
BA1M Implement NumberToPattern 494
BA1N Generate the d-Neighborhood of a String 518
BA2A Implement MotifEnumeration 426
BA2B Find a Median String 418
BA2C Find a Profile-most Probable k-mer in a String 444
BA2D Implement GreedyMotifSearch 368
BA2E Implement GreedyMotifSearch with Pseudocounts 313
BA2F Implement RandomizedMotifSearch 251
BA2G Implement GibbsSampler 225
BA2H Implement DistanceBetweenPatternAndStrings 289
BA3A Generate the k-mer Composition of a String 542
BA3B Reconstruct a String from its Genome Path 478
BA3C Construct the Overlap Graph of a Collection of k-mers 445
BA3D Construct the De Bruijn Graph of a String 442
BA3E Construct the De Bruijn Graph of a Collection of k-mers 410
BA3F Find an Eulerian Cycle in a Graph 304
BA3G Find an Eulerian Path in a Graph 252
BA3H Reconstruct a String from its k-mer Composition 249
BA3I Find a k-Universal Circular String 195
BA3J Reconstruct a String from its Paired Composition 181
BA3K Generate Contigs from a Collection of Reads 176
BA3L Construct a String Spelled by a Gapped Genome Path 147
BA3M Generate All Maximal Non-Branching Paths in a Graph 128
BA4A Translate an RNA String into an Amino Acid String 357
BA4B Find Substrings of a Genome Encoding a Given Amino Acid String 264
BA4C Generate the Theoretical Spectrum of a Cyclic Peptide 264
BA4D Compute the Number of Peptides of Given Total Mass 154
BA4E Find a Cyclic Peptide with Theoretical Spectrum Matching an Ideal Spectrum 196
BA4F Compute the Score of a Cyclic Peptide Against a Spectrum 158
BA4G Implement LeaderboardCyclopeptideSequencing 149
BA4H Generate the Convolution of a Spectrum 154
BA4I Implement ConvolutionCyclopeptideSequencing 111
BA4J Generate the Theoretical Spectrum of a Linear Peptide 175
BA4K Compute the Score of a Linear Peptide 136
BA4L Trim a Peptide Leaderboard 120
BA4M Solve the Turnpike Problem 70
BA5A Find the Minimum Number of Coins Needed to Make Change 472
BA5B Find the Length of a Longest Path in a Manhattan-like Grid 380
BA5C Find a Longest Common Subsequence of Two Strings 472
BA5D Find the Longest Path in a DAG 312
BA5E Find a Highest-Scoring Alignment of Two Strings 436
BA5F Find a Highest-Scoring Local Alignment of Two Strings 360
BA5G Compute the Edit Distance Between Two Strings 432
BA5H Find a Highest-Scoring Fitting Alignment of Two Strings 267
BA5I Find a Highest-Scoring Overlap Alignment of Two Strings 243
BA5J Align Two Strings Using Affine Gap Penalties 270
BA5K Find a Middle Edge in an Alignment Graph in Linear Space 170
BA5L Align Two Strings Using Linear Space 150
BA5M Find a Highest-Scoring Multiple Sequence Alignment 171
BA5N Find a Topological Ordering of a DAG 118
BA6A Implement GreedySorting to Sort a Permutation by Reversals 274
BA6B Compute the Number of Breakpoints in a Permutation 299
BA6C Compute the 2-Break Distance Between a Pair of Genomes 198
BA6D Find a Shortest Transformation of One Genome into Another by 2-Breaks 60
BA6E Find All Shared k-mers of a Pair of Strings 203
BA6F Implement ChromosomeToCycle 120
BA6G Implement CycleToChromosome 115
BA6H Implement ColoredEdges 105
BA6I Implement GraphToGenome 86
BA6J Implement 2-BreakOnGenomeGraph 80
BA6K Implement 2-BreakOnGenome 69
BA7A Compute Distances Between Leaves 135
BA7B Compute Limb Lengths in a Tree 143
BA7C Implement AdditivePhylogeny 98
BA7D Implement UPGMA 94
BA7E Implement the Neighbor Joining Algorithm 80
BA7F Implement SmallParsimony 71
BA7G Adapt SmallParsimony to Unrooted Trees 46
BA8A Implement FarthestFirstTraversal 104
BA8B Compute the Squared Error Distortion 98
BA8C Implement the Lloyd Algorithm for k-Means Clustering 106
BA8D Implement the Soft k-Means Clustering Algorithm 87
BA8E Implement Hierarchical Clustering 82
BA9A Construct a Trie from a Collection of Patterns 237
BA9B Implement TrieMatching 210
BA9C Construct the Suffix Tree of a String 164
BA9D Find the Longest Repeat in a String 191
BA9E Find the Longest Substring Shared by Two Strings 180
BA9F Find the Shortest Non-Shared Substring of Two Strings 145
BA9G Construct the Suffix Array of a String 189
BA9H Pattern Matching with the Suffix Array 103
BA9I Construct the Burrows-Wheeler Transform of a String 227
BA9J Reconstruct a String from its Burrows-Wheeler Transform 187
BA9K Generate the Last-to-First Mapping of a String 116
BA9L Implement BWMatching 146
BA9M Implement BetterBWMatching 132
BA9N Find All Occurrences of a Collection of Patterns in a String 144
BA9O Find All Approximate Occurrences of a Collection of Patterns in a String 114
BA9P Implement TreeColoring 59
BA9Q Construct the Partial Suffix Array of a String 118
BA9R Construct a Suffix Tree from a Suffix Array 88