Problems

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Problems: 285 (total), users: 80568, attempts: 1322301, correct: 731880
ID Title Solved By Correct Ratio
BA10A Compute the Probability of a Hidden Path 579
BA10B Compute the Probability of an Outcome Given a Hidden Path 484
BA10C Implement the Viterbi Algorithm 283
BA10D Compute the Probability of a String Emitted by an HMM 239
BA10E Construct a Profile HMM 147
BA10F Construct a Profile HMM with Pseudocounts 134
BA10G Perform a Multiple Sequence Alignment with a Profile HMM 76
BA10H Estimate the Parameters of an HMM 103
BA10I Implement Viterbi Learning 87
BA10J Solve the Soft Decoding Problem 94
BA10K Implement Baum-Welch Learning 74
BA11A Construct the Graph of a Spectrum 134
BA11B Implement DecodingIdealSpectrum 96
BA11C Convert a Peptide into a Peptide Vector 137
BA11D Convert a Peptide Vector into a Peptide 132
BA11E Sequence a Peptide 78
BA11F Find a Highest-Scoring Peptide in a Proteome against a Spectrum 78
BA11G Implement PSMSearch 75
BA11H Compute the Size of a Spectral Dictionary 66
BA11I Compute the Probability of a Spectral Dictionary 65
BA11J Find a Highest-Scoring Modified Peptide against a Spectrum 51
BA1A Compute the Number of Times a Pattern Appears in a Text 1501
BA1B Find the Most Frequent Words in a String 1667
BA1C Find the Reverse Complement of a String 1599
BA1D Find All Occurrences of a Pattern in a String 1481
BA1E Find Patterns Forming Clumps in a String 1185
BA1F Find a Position in a Genome Minimizing the Skew 1200
BA1G Compute the Hamming Distance Between Two Strings 1257
BA1H Find All Approximate Occurrences of a Pattern in a String 1061
BA1I Find the Most Frequent Words with Mismatches in a String 865
BA1J Find Frequent Words with Mismatches and Reverse Complements 791
BA1K Generate the Frequency Array of a String 710
BA1L Implement PatternToNumber 776
BA1M Implement NumberToPattern 737
BA1N Generate the d-Neighborhood of a String 743
BA2A Implement MotifEnumeration 632
BA2B Find a Median String 640
BA2C Find a Profile-most Probable k-mer in a String 644
BA2D Implement GreedyMotifSearch 552
BA2E Implement GreedyMotifSearch with Pseudocounts 493
BA2F Implement RandomizedMotifSearch 394
BA2G Implement GibbsSampler 346
BA2H Implement DistanceBetweenPatternAndStrings 437
BA3A Generate the k-mer Composition of a String 807
BA3B Reconstruct a String from its Genome Path 728
BA3C Construct the Overlap Graph of a Collection of k-mers 672
BA3D Construct the De Bruijn Graph of a String 691
BA3E Construct the De Bruijn Graph of a Collection of k-mers 613
BA3F Find an Eulerian Cycle in a Graph 466
BA3G Find an Eulerian Path in a Graph 419
BA3H Reconstruct a String from its k-mer Composition 464
BA3I Find a k-Universal Circular String 311
BA3J Reconstruct a String from its Paired Composition 270
BA3K Generate Contigs from a Collection of Reads 263
BA3L Construct a String Spelled by a Gapped Genome Path 225
BA3M Generate All Maximal Non-Branching Paths in a Graph 208
BA4A Translate an RNA String into an Amino Acid String 533
BA4B Find Substrings of a Genome Encoding a Given Amino Acid String 433
BA4C Generate the Theoretical Spectrum of a Cyclic Peptide 414
BA4D Compute the Number of Peptides of Given Total Mass 276
BA4E Find a Cyclic Peptide with Theoretical Spectrum Matching an Ideal Spectrum 318
BA4F Compute the Score of a Cyclic Peptide Against a Spectrum 256
BA4G Implement LeaderboardCyclopeptideSequencing 235
BA4H Generate the Convolution of a Spectrum 239
BA4I Implement ConvolutionCyclopeptideSequencing 170
BA4J Generate the Theoretical Spectrum of a Linear Peptide 260
BA4K Compute the Score of a Linear Peptide 209
BA4L Trim a Peptide Leaderboard 185
BA4M Solve the Turnpike Problem 106
BA5A Find the Minimum Number of Coins Needed to Make Change 611
BA5B Find the Length of a Longest Path in a Manhattan-like Grid 482
BA5C Find a Longest Common Subsequence of Two Strings 624
BA5D Find the Longest Path in a DAG 384
BA5E Find a Highest-Scoring Alignment of Two Strings 564
BA5F Find a Highest-Scoring Local Alignment of Two Strings 444
BA5G Compute the Edit Distance Between Two Strings 502
BA5H Find a Highest-Scoring Fitting Alignment of Two Strings 321
BA5I Find a Highest-Scoring Overlap Alignment of Two Strings 282
BA5J Align Two Strings Using Affine Gap Penalties 328
BA5K Find a Middle Edge in an Alignment Graph in Linear Space 203
BA5L Align Two Strings Using Linear Space 178
BA5M Find a Highest-Scoring Multiple Sequence Alignment 216
BA5N Find a Topological Ordering of a DAG 152
BA6A Implement GreedySorting to Sort a Permutation by Reversals 337
BA6B Compute the Number of Breakpoints in a Permutation 372
BA6C Compute the 2-Break Distance Between a Pair of Genomes 247
BA6D Find a Shortest Transformation of One Genome into Another by 2-Breaks 85
BA6E Find All Shared k-mers of a Pair of Strings 221
BA6F Implement ChromosomeToCycle 147
BA6G Implement CycleToChromosome 141
BA6H Implement ColoredEdges 131
BA6I Implement GraphToGenome 107
BA6J Implement 2-BreakOnGenomeGraph 112
BA6K Implement 2-BreakOnGenome 99
BA7A Compute Distances Between Leaves 197
BA7B Compute Limb Lengths in a Tree 203
BA7C Implement AdditivePhylogeny 159
BA7D Implement UPGMA 145
BA7E Implement the Neighbor Joining Algorithm 128
BA7F Implement SmallParsimony 98
BA7G Adapt SmallParsimony to Unrooted Trees 68
BA8A Implement FarthestFirstTraversal 136
BA8B Compute the Squared Error Distortion 131
BA8C Implement the Lloyd Algorithm for k-Means Clustering 143
BA8D Implement the Soft k-Means Clustering Algorithm 107
BA8E Implement Hierarchical Clustering 108
BA9A Construct a Trie from a Collection of Patterns 282
BA9B Implement TrieMatching 255
BA9C Construct the Suffix Tree of a String 195
BA9D Find the Longest Repeat in a String 224
BA9E Find the Longest Substring Shared by Two Strings 201
BA9F Find the Shortest Non-Shared Substring of Two Strings 169
BA9G Construct the Suffix Array of a String 241
BA9H Pattern Matching with the Suffix Array 136
BA9I Construct the Burrows-Wheeler Transform of a String 286
BA9J Reconstruct a String from its Burrows-Wheeler Transform 236
BA9K Generate the Last-to-First Mapping of a String 172
BA9L Implement BWMatching 179
BA9M Implement BetterBWMatching 162
BA9N Find All Occurrences of a Collection of Patterns in a String 169
BA9O Find All Approximate Occurrences of a Collection of Patterns in a String 137
BA9P Implement TreeColoring 71
BA9Q Construct the Partial Suffix Array of a String 134
BA9R Construct a Suffix Tree from a Suffix Array 102