Problems

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Problems: 285 (total), users: 75514, attempts: 1239628, correct: 687938
ID Title Solved By Correct Ratio
BA10A Compute the Probability of a Hidden Path 526
BA10B Compute the Probability of an Outcome Given a Hidden Path 442
BA10C Implement the Viterbi Algorithm 265
BA10D Compute the Probability of a String Emitted by an HMM 226
BA10E Construct a Profile HMM 138
BA10F Construct a Profile HMM with Pseudocounts 127
BA10G Perform a Multiple Sequence Alignment with a Profile HMM 72
BA10H Estimate the Parameters of an HMM 98
BA10I Implement Viterbi Learning 84
BA10J Solve the Soft Decoding Problem 91
BA10K Implement Baum-Welch Learning 71
BA11A Construct the Graph of a Spectrum 121
BA11B Implement DecodingIdealSpectrum 91
BA11C Convert a Peptide into a Peptide Vector 125
BA11D Convert a Peptide Vector into a Peptide 120
BA11E Sequence a Peptide 73
BA11F Find a Highest-Scoring Peptide in a Proteome against a Spectrum 72
BA11G Implement PSMSearch 70
BA11H Compute the Size of a Spectral Dictionary 60
BA11I Compute the Probability of a Spectral Dictionary 59
BA11J Find a Highest-Scoring Modified Peptide against a Spectrum 46
BA1A Compute the Number of Times a Pattern Appears in a Text 1295
BA1B Find the Most Frequent Words in a String 1464
BA1C Find the Reverse Complement of a String 1420
BA1D Find All Occurrences of a Pattern in a String 1316
BA1E Find Patterns Forming Clumps in a String 1035
BA1F Find a Position in a Genome Minimizing the Skew 1050
BA1G Compute the Hamming Distance Between Two Strings 1102
BA1H Find All Approximate Occurrences of a Pattern in a String 914
BA1I Find the Most Frequent Words with Mismatches in a String 752
BA1J Find Frequent Words with Mismatches and Reverse Complements 686
BA1K Generate the Frequency Array of a String 636
BA1L Implement PatternToNumber 688
BA1M Implement NumberToPattern 653
BA1N Generate the d-Neighborhood of a String 665
BA2A Implement MotifEnumeration 556
BA2B Find a Median String 562
BA2C Find a Profile-most Probable k-mer in a String 569
BA2D Implement GreedyMotifSearch 478
BA2E Implement GreedyMotifSearch with Pseudocounts 417
BA2F Implement RandomizedMotifSearch 338
BA2G Implement GibbsSampler 293
BA2H Implement DistanceBetweenPatternAndStrings 383
BA3A Generate the k-mer Composition of a String 690
BA3B Reconstruct a String from its Genome Path 615
BA3C Construct the Overlap Graph of a Collection of k-mers 576
BA3D Construct the De Bruijn Graph of a String 602
BA3E Construct the De Bruijn Graph of a Collection of k-mers 527
BA3F Find an Eulerian Cycle in a Graph 395
BA3G Find an Eulerian Path in a Graph 334
BA3H Reconstruct a String from its k-mer Composition 359
BA3I Find a k-Universal Circular String 263
BA3J Reconstruct a String from its Paired Composition 227
BA3K Generate Contigs from a Collection of Reads 232
BA3L Construct a String Spelled by a Gapped Genome Path 190
BA3M Generate All Maximal Non-Branching Paths in a Graph 182
BA4A Translate an RNA String into an Amino Acid String 457
BA4B Find Substrings of a Genome Encoding a Given Amino Acid String 367
BA4C Generate the Theoretical Spectrum of a Cyclic Peptide 354
BA4D Compute the Number of Peptides of Given Total Mass 230
BA4E Find a Cyclic Peptide with Theoretical Spectrum Matching an Ideal Spectrum 264
BA4F Compute the Score of a Cyclic Peptide Against a Spectrum 215
BA4G Implement LeaderboardCyclopeptideSequencing 199
BA4H Generate the Convolution of a Spectrum 203
BA4I Implement ConvolutionCyclopeptideSequencing 142
BA4J Generate the Theoretical Spectrum of a Linear Peptide 224
BA4K Compute the Score of a Linear Peptide 175
BA4L Trim a Peptide Leaderboard 157
BA4M Solve the Turnpike Problem 84
BA5A Find the Minimum Number of Coins Needed to Make Change 550
BA5B Find the Length of a Longest Path in a Manhattan-like Grid 438
BA5C Find a Longest Common Subsequence of Two Strings 544
BA5D Find the Longest Path in a DAG 351
BA5E Find a Highest-Scoring Alignment of Two Strings 526
BA5F Find a Highest-Scoring Local Alignment of Two Strings 416
BA5G Compute the Edit Distance Between Two Strings 473
BA5H Find a Highest-Scoring Fitting Alignment of Two Strings 300
BA5I Find a Highest-Scoring Overlap Alignment of Two Strings 267
BA5J Align Two Strings Using Affine Gap Penalties 311
BA5K Find a Middle Edge in an Alignment Graph in Linear Space 192
BA5L Align Two Strings Using Linear Space 173
BA5M Find a Highest-Scoring Multiple Sequence Alignment 203
BA5N Find a Topological Ordering of a DAG 141
BA6A Implement GreedySorting to Sort a Permutation by Reversals 320
BA6B Compute the Number of Breakpoints in a Permutation 353
BA6C Compute the 2-Break Distance Between a Pair of Genomes 236
BA6D Find a Shortest Transformation of One Genome into Another by 2-Breaks 81
BA6E Find All Shared k-mers of a Pair of Strings 216
BA6F Implement ChromosomeToCycle 137
BA6G Implement CycleToChromosome 132
BA6H Implement ColoredEdges 121
BA6I Implement GraphToGenome 99
BA6J Implement 2-BreakOnGenomeGraph 98
BA6K Implement 2-BreakOnGenome 93
BA7A Compute Distances Between Leaves 178
BA7B Compute Limb Lengths in a Tree 185
BA7C Implement AdditivePhylogeny 147
BA7D Implement UPGMA 135
BA7E Implement the Neighbor Joining Algorithm 112
BA7F Implement SmallParsimony 94
BA7G Adapt SmallParsimony to Unrooted Trees 61
BA8A Implement FarthestFirstTraversal 126
BA8B Compute the Squared Error Distortion 117
BA8C Implement the Lloyd Algorithm for k-Means Clustering 132
BA8D Implement the Soft k-Means Clustering Algorithm 102
BA8E Implement Hierarchical Clustering 98
BA9A Construct a Trie from a Collection of Patterns 270
BA9B Implement TrieMatching 241
BA9C Construct the Suffix Tree of a String 182
BA9D Find the Longest Repeat in a String 213
BA9E Find the Longest Substring Shared by Two Strings 194
BA9F Find the Shortest Non-Shared Substring of Two Strings 162
BA9G Construct the Suffix Array of a String 232
BA9H Pattern Matching with the Suffix Array 130
BA9I Construct the Burrows-Wheeler Transform of a String 275
BA9J Reconstruct a String from its Burrows-Wheeler Transform 221
BA9K Generate the Last-to-First Mapping of a String 155
BA9L Implement BWMatching 172
BA9M Implement BetterBWMatching 158
BA9N Find All Occurrences of a Collection of Patterns in a String 165
BA9O Find All Approximate Occurrences of a Collection of Patterns in a String 134
BA9P Implement TreeColoring 67
BA9Q Construct the Partial Suffix Array of a String 131
BA9R Construct a Suffix Tree from a Suffix Array 96