Problems

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Problems: 285 (total), users: 83266, attempts: 1372035, correct: 759239
ID Title Solved By Correct Ratio
BA10A Compute the Probability of a Hidden Path 619
BA10B Compute the Probability of an Outcome Given a Hidden Path 516
BA10C Implement the Viterbi Algorithm 311
BA10D Compute the Probability of a String Emitted by an HMM 254
BA10E Construct a Profile HMM 155
BA10F Construct a Profile HMM with Pseudocounts 145
BA10G Perform a Multiple Sequence Alignment with a Profile HMM 81
BA10H Estimate the Parameters of an HMM 120
BA10I Implement Viterbi Learning 97
BA10J Solve the Soft Decoding Problem 102
BA10K Implement Baum-Welch Learning 80
BA11A Construct the Graph of a Spectrum 139
BA11B Implement DecodingIdealSpectrum 99
BA11C Convert a Peptide into a Peptide Vector 146
BA11D Convert a Peptide Vector into a Peptide 141
BA11E Sequence a Peptide 81
BA11F Find a Highest-Scoring Peptide in a Proteome against a Spectrum 81
BA11G Implement PSMSearch 78
BA11H Compute the Size of a Spectral Dictionary 69
BA11I Compute the Probability of a Spectral Dictionary 68
BA11J Find a Highest-Scoring Modified Peptide against a Spectrum 54
BA1A Compute the Number of Times a Pattern Appears in a Text 1589
BA1B Find the Most Frequent Words in a String 1747
BA1C Find the Reverse Complement of a String 1675
BA1D Find All Occurrences of a Pattern in a String 1558
BA1E Find Patterns Forming Clumps in a String 1263
BA1F Find a Position in a Genome Minimizing the Skew 1273
BA1G Compute the Hamming Distance Between Two Strings 1324
BA1H Find All Approximate Occurrences of a Pattern in a String 1131
BA1I Find the Most Frequent Words with Mismatches in a String 923
BA1J Find Frequent Words with Mismatches and Reverse Complements 839
BA1K Generate the Frequency Array of a String 747
BA1L Implement PatternToNumber 823
BA1M Implement NumberToPattern 781
BA1N Generate the d-Neighborhood of a String 775
BA2A Implement MotifEnumeration 668
BA2B Find a Median String 695
BA2C Find a Profile-most Probable k-mer in a String 695
BA2D Implement GreedyMotifSearch 605
BA2E Implement GreedyMotifSearch with Pseudocounts 535
BA2F Implement RandomizedMotifSearch 438
BA2G Implement GibbsSampler 377
BA2H Implement DistanceBetweenPatternAndStrings 479
BA3A Generate the k-mer Composition of a String 849
BA3B Reconstruct a String from its Genome Path 768
BA3C Construct the Overlap Graph of a Collection of k-mers 716
BA3D Construct the De Bruijn Graph of a String 740
BA3E Construct the De Bruijn Graph of a Collection of k-mers 650
BA3F Find an Eulerian Cycle in a Graph 492
BA3G Find an Eulerian Path in a Graph 440
BA3H Reconstruct a String from its k-mer Composition 506
BA3I Find a k-Universal Circular String 348
BA3J Reconstruct a String from its Paired Composition 302
BA3K Generate Contigs from a Collection of Reads 286
BA3L Construct a String Spelled by a Gapped Genome Path 259
BA3M Generate All Maximal Non-Branching Paths in a Graph 218
BA4A Translate an RNA String into an Amino Acid String 559
BA4B Find Substrings of a Genome Encoding a Given Amino Acid String 470
BA4C Generate the Theoretical Spectrum of a Cyclic Peptide 437
BA4D Compute the Number of Peptides of Given Total Mass 308
BA4E Find a Cyclic Peptide with Theoretical Spectrum Matching an Ideal Spectrum 349
BA4F Compute the Score of a Cyclic Peptide Against a Spectrum 269
BA4G Implement LeaderboardCyclopeptideSequencing 258
BA4H Generate the Convolution of a Spectrum 254
BA4I Implement ConvolutionCyclopeptideSequencing 180
BA4J Generate the Theoretical Spectrum of a Linear Peptide 270
BA4K Compute the Score of a Linear Peptide 217
BA4L Trim a Peptide Leaderboard 195
BA4M Solve the Turnpike Problem 115
BA5A Find the Minimum Number of Coins Needed to Make Change 637
BA5B Find the Length of a Longest Path in a Manhattan-like Grid 509
BA5C Find a Longest Common Subsequence of Two Strings 643
BA5D Find the Longest Path in a DAG 400
BA5E Find a Highest-Scoring Alignment of Two Strings 596
BA5F Find a Highest-Scoring Local Alignment of Two Strings 470
BA5G Compute the Edit Distance Between Two Strings 525
BA5H Find a Highest-Scoring Fitting Alignment of Two Strings 339
BA5I Find a Highest-Scoring Overlap Alignment of Two Strings 304
BA5J Align Two Strings Using Affine Gap Penalties 344
BA5K Find a Middle Edge in an Alignment Graph in Linear Space 218
BA5L Align Two Strings Using Linear Space 190
BA5M Find a Highest-Scoring Multiple Sequence Alignment 226
BA5N Find a Topological Ordering of a DAG 168
BA6A Implement GreedySorting to Sort a Permutation by Reversals 350
BA6B Compute the Number of Breakpoints in a Permutation 387
BA6C Compute the 2-Break Distance Between a Pair of Genomes 255
BA6D Find a Shortest Transformation of One Genome into Another by 2-Breaks 92
BA6E Find All Shared k-mers of a Pair of Strings 227
BA6F Implement ChromosomeToCycle 156
BA6G Implement CycleToChromosome 150
BA6H Implement ColoredEdges 141
BA6I Implement GraphToGenome 114
BA6J Implement 2-BreakOnGenomeGraph 119
BA6K Implement 2-BreakOnGenome 104
BA7A Compute Distances Between Leaves 204
BA7B Compute Limb Lengths in a Tree 224
BA7C Implement AdditivePhylogeny 173
BA7D Implement UPGMA 154
BA7E Implement the Neighbor Joining Algorithm 155
BA7F Implement SmallParsimony 111
BA7G Adapt SmallParsimony to Unrooted Trees 76
BA8A Implement FarthestFirstTraversal 146
BA8B Compute the Squared Error Distortion 140
BA8C Implement the Lloyd Algorithm for k-Means Clustering 154
BA8D Implement the Soft k-Means Clustering Algorithm 110
BA8E Implement Hierarchical Clustering 117
BA9A Construct a Trie from a Collection of Patterns 292
BA9B Implement TrieMatching 270
BA9C Construct the Suffix Tree of a String 203
BA9D Find the Longest Repeat in a String 232
BA9E Find the Longest Substring Shared by Two Strings 210
BA9F Find the Shortest Non-Shared Substring of Two Strings 174
BA9G Construct the Suffix Array of a String 258
BA9H Pattern Matching with the Suffix Array 144
BA9I Construct the Burrows-Wheeler Transform of a String 300
BA9J Reconstruct a String from its Burrows-Wheeler Transform 250
BA9K Generate the Last-to-First Mapping of a String 192
BA9L Implement BWMatching 197
BA9M Implement BetterBWMatching 177
BA9N Find All Occurrences of a Collection of Patterns in a String 177
BA9O Find All Approximate Occurrences of a Collection of Patterns in a String 143
BA9P Implement TreeColoring 76
BA9Q Construct the Partial Suffix Array of a String 139
BA9R Construct a Suffix Tree from a Suffix Array 107