Problems

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Problems: 285 (total), users: 70828, attempts: 1162933, correct: 646621
ID Title Solved By Correct Ratio
BA10A Compute the Probability of a Hidden Path 493
BA10B Compute the Probability of an Outcome Given a Hidden Path 418
BA10C Implement the Viterbi Algorithm 256
BA10D Compute the Probability of a String Emitted by an HMM 218
BA10E Construct a Profile HMM 134
BA10F Construct a Profile HMM with Pseudocounts 123
BA10G Perform a Multiple Sequence Alignment with a Profile HMM 68
BA10H Estimate the Parameters of an HMM 92
BA10I Implement Viterbi Learning 79
BA10J Solve the Soft Decoding Problem 85
BA10K Implement Baum-Welch Learning 67
BA11A Construct the Graph of a Spectrum 114
BA11B Implement DecodingIdealSpectrum 87
BA11C Convert a Peptide into a Peptide Vector 119
BA11D Convert a Peptide Vector into a Peptide 114
BA11E Sequence a Peptide 70
BA11F Find a Highest-Scoring Peptide in a Proteome against a Spectrum 69
BA11G Implement PSMSearch 67
BA11H Compute the Size of a Spectral Dictionary 57
BA11I Compute the Probability of a Spectral Dictionary 56
BA11J Find a Highest-Scoring Modified Peptide against a Spectrum 45
BA1A Compute the Number of Times a Pattern Appears in a Text 1157
BA1B Find the Most Frequent Words in a String 1331
BA1C Find the Reverse Complement of a String 1289
BA1D Find All Occurrences of a Pattern in a String 1194
BA1E Find Patterns Forming Clumps in a String 930
BA1F Find a Position in a Genome Minimizing the Skew 945
BA1G Compute the Hamming Distance Between Two Strings 980
BA1H Find All Approximate Occurrences of a Pattern in a String 865
BA1I Find the Most Frequent Words with Mismatches in a String 713
BA1J Find Frequent Words with Mismatches and Reverse Complements 651
BA1K Generate the Frequency Array of a String 599
BA1L Implement PatternToNumber 649
BA1M Implement NumberToPattern 617
BA1N Generate the d-Neighborhood of a String 627
BA2A Implement MotifEnumeration 520
BA2B Find a Median String 536
BA2C Find a Profile-most Probable k-mer in a String 544
BA2D Implement GreedyMotifSearch 459
BA2E Implement GreedyMotifSearch with Pseudocounts 400
BA2F Implement RandomizedMotifSearch 320
BA2G Implement GibbsSampler 273
BA2H Implement DistanceBetweenPatternAndStrings 366
BA3A Generate the k-mer Composition of a String 652
BA3B Reconstruct a String from its Genome Path 584
BA3C Construct the Overlap Graph of a Collection of k-mers 533
BA3D Construct the De Bruijn Graph of a String 545
BA3E Construct the De Bruijn Graph of a Collection of k-mers 486
BA3F Find an Eulerian Cycle in a Graph 378
BA3G Find an Eulerian Path in a Graph 320
BA3H Reconstruct a String from its k-mer Composition 333
BA3I Find a k-Universal Circular String 252
BA3J Reconstruct a String from its Paired Composition 218
BA3K Generate Contigs from a Collection of Reads 212
BA3L Construct a String Spelled by a Gapped Genome Path 183
BA3M Generate All Maximal Non-Branching Paths in a Graph 159
BA4A Translate an RNA String into an Amino Acid String 433
BA4B Find Substrings of a Genome Encoding a Given Amino Acid String 350
BA4C Generate the Theoretical Spectrum of a Cyclic Peptide 332
BA4D Compute the Number of Peptides of Given Total Mass 220
BA4E Find a Cyclic Peptide with Theoretical Spectrum Matching an Ideal Spectrum 251
BA4F Compute the Score of a Cyclic Peptide Against a Spectrum 203
BA4G Implement LeaderboardCyclopeptideSequencing 187
BA4H Generate the Convolution of a Spectrum 191
BA4I Implement ConvolutionCyclopeptideSequencing 136
BA4J Generate the Theoretical Spectrum of a Linear Peptide 209
BA4K Compute the Score of a Linear Peptide 164
BA4L Trim a Peptide Leaderboard 148
BA4M Solve the Turnpike Problem 80
BA5A Find the Minimum Number of Coins Needed to Make Change 532
BA5B Find the Length of a Longest Path in a Manhattan-like Grid 425
BA5C Find a Longest Common Subsequence of Two Strings 517
BA5D Find the Longest Path in a DAG 341
BA5E Find a Highest-Scoring Alignment of Two Strings 496
BA5F Find a Highest-Scoring Local Alignment of Two Strings 409
BA5G Compute the Edit Distance Between Two Strings 463
BA5H Find a Highest-Scoring Fitting Alignment of Two Strings 293
BA5I Find a Highest-Scoring Overlap Alignment of Two Strings 262
BA5J Align Two Strings Using Affine Gap Penalties 290
BA5K Find a Middle Edge in an Alignment Graph in Linear Space 188
BA5L Align Two Strings Using Linear Space 167
BA5M Find a Highest-Scoring Multiple Sequence Alignment 185
BA5N Find a Topological Ordering of a DAG 133
BA6A Implement GreedySorting to Sort a Permutation by Reversals 302
BA6B Compute the Number of Breakpoints in a Permutation 331
BA6C Compute the 2-Break Distance Between a Pair of Genomes 220
BA6D Find a Shortest Transformation of One Genome into Another by 2-Breaks 71
BA6E Find All Shared k-mers of a Pair of Strings 213
BA6F Implement ChromosomeToCycle 130
BA6G Implement CycleToChromosome 126
BA6H Implement ColoredEdges 116
BA6I Implement GraphToGenome 95
BA6J Implement 2-BreakOnGenomeGraph 89
BA6K Implement 2-BreakOnGenome 86
BA7A Compute Distances Between Leaves 155
BA7B Compute Limb Lengths in a Tree 163
BA7C Implement AdditivePhylogeny 120
BA7D Implement UPGMA 122
BA7E Implement the Neighbor Joining Algorithm 99
BA7F Implement SmallParsimony 86
BA7G Adapt SmallParsimony to Unrooted Trees 56
BA8A Implement FarthestFirstTraversal 117
BA8B Compute the Squared Error Distortion 110
BA8C Implement the Lloyd Algorithm for k-Means Clustering 123
BA8D Implement the Soft k-Means Clustering Algorithm 98
BA8E Implement Hierarchical Clustering 95
BA9A Construct a Trie from a Collection of Patterns 260
BA9B Implement TrieMatching 234
BA9C Construct the Suffix Tree of a String 176
BA9D Find the Longest Repeat in a String 204
BA9E Find the Longest Substring Shared by Two Strings 187
BA9F Find the Shortest Non-Shared Substring of Two Strings 153
BA9G Construct the Suffix Array of a String 218
BA9H Pattern Matching with the Suffix Array 120
BA9I Construct the Burrows-Wheeler Transform of a String 265
BA9J Reconstruct a String from its Burrows-Wheeler Transform 212
BA9K Generate the Last-to-First Mapping of a String 141
BA9L Implement BWMatching 165
BA9M Implement BetterBWMatching 150
BA9N Find All Occurrences of a Collection of Patterns in a String 157
BA9O Find All Approximate Occurrences of a Collection of Patterns in a String 129
BA9P Implement TreeColoring 64
BA9Q Construct the Partial Suffix Array of a String 125
BA9R Construct a Suffix Tree from a Suffix Array 93