Problems

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Problems: 284 (total), users: 97130, attempts: 1610100, correct: 888714
ID Title Solved By Correct Ratio
BA10A Compute the Probability of a Hidden Path 714
BA10B Compute the Probability of an Outcome Given a Hidden Path 595
BA10C Implement the Viterbi Algorithm 439
BA10D Compute the Probability of a String Emitted by an HMM 306
BA10E Construct a Profile HMM 176
BA10F Construct a Profile HMM with Pseudocounts 169
BA10G Perform a Multiple Sequence Alignment with a Profile HMM 95
BA10H Estimate the Parameters of an HMM 150
BA10I Implement Viterbi Learning 115
BA10J Solve the Soft Decoding Problem 131
BA10K Implement Baum-Welch Learning 123
BA11A Construct the Graph of a Spectrum 165
BA11B Implement DecodingIdealSpectrum 121
BA11C Convert a Peptide into a Peptide Vector 171
BA11D Convert a Peptide Vector into a Peptide 165
BA11E Sequence a Peptide 98
BA11F Find a Highest-Scoring Peptide in a Proteome against a Spectrum 98
BA11G Implement PSMSearch 91
BA11H Compute the Size of a Spectral Dictionary 85
BA11I Compute the Probability of a Spectral Dictionary 84
BA11J Find a Highest-Scoring Modified Peptide against a Spectrum 63
BA1A Compute the Number of Times a Pattern Appears in a Text 2262
BA1B Find the Most Frequent Words in a String 2401
BA1C Find the Reverse Complement of a String 2295
BA1D Find All Occurrences of a Pattern in a String 2164
BA1E Find Patterns Forming Clumps in a String 1865
BA1F Find a Position in a Genome Minimizing the Skew 1835
BA1G Compute the Hamming Distance Between Two Strings 1908
BA1H Find All Approximate Occurrences of a Pattern in a String 1441
BA1I Find the Most Frequent Words with Mismatches in a String 1202
BA1J Find Frequent Words with Mismatches and Reverse Complements 1087
BA1K Generate the Frequency Array of a String 963
BA1L Implement PatternToNumber 1154
BA1M Implement NumberToPattern 1104
BA1N Generate the d-Neighborhood of a String 1001
BA2A Implement MotifEnumeration 1003
BA2B Find a Median String 975
BA2C Find a Profile-most Probable k-mer in a String 892
BA2D Implement GreedyMotifSearch 833
BA2E Implement GreedyMotifSearch with Pseudocounts 730
BA2F Implement RandomizedMotifSearch 663
BA2G Implement GibbsSampler 528
BA2H Implement DistanceBetweenPatternAndStrings 781
BA3A Generate the k-mer Composition of a String 1085
BA3B Reconstruct a String from its Genome Path 1012
BA3C Construct the Overlap Graph of a Collection of k-mers 946
BA3D Construct the De Bruijn Graph of a String 930
BA3E Construct the De Bruijn Graph of a Collection of k-mers 829
BA3F Find an Eulerian Cycle in a Graph 642
BA3G Find an Eulerian Path in a Graph 580
BA3H Reconstruct a String from its k-mer Composition 703
BA3I Find a k-Universal Circular String 477
BA3J Reconstruct a String from its Paired Composition 459
BA3K Generate Contigs from a Collection of Reads 379
BA3L Construct a String Spelled by a Gapped Genome Path 358
BA3M Generate All Maximal Non-Branching Paths in a Graph 281
BA4A Translate an RNA String into an Amino Acid String 727
BA4B Find Substrings of a Genome Encoding a Given Amino Acid String 636
BA4C Generate the Theoretical Spectrum of a Cyclic Peptide 572
BA4D Compute the Number of Peptides of Given Total Mass 421
BA4E Find a Cyclic Peptide with Theoretical Spectrum Matching an Ideal Spectrum 448
BA4F Compute the Score of a Cyclic Peptide Against a Spectrum 356
BA4G Implement LeaderboardCyclopeptideSequencing 351
BA4H Generate the Convolution of a Spectrum 344
BA4I Implement ConvolutionCyclopeptideSequencing 233
BA4J Generate the Theoretical Spectrum of a Linear Peptide 341
BA4K Compute the Score of a Linear Peptide 284
BA4L Trim a Peptide Leaderboard 257
BA4M Solve the Turnpike Problem 151
BA5A Find the Minimum Number of Coins Needed to Make Change 776
BA5B Find the Length of a Longest Path in a Manhattan-like Grid 630
BA5C Find a Longest Common Subsequence of Two Strings 755
BA5D Find the Longest Path in a DAG 471
BA5E Find a Highest-Scoring Alignment of Two Strings 715
BA5F Find a Highest-Scoring Local Alignment of Two Strings 576
BA5G Compute the Edit Distance Between Two Strings 614
BA5H Find a Highest-Scoring Fitting Alignment of Two Strings 400
BA5I Find a Highest-Scoring Overlap Alignment of Two Strings 358
BA5J Align Two Strings Using Affine Gap Penalties 472
BA5K Find a Middle Edge in an Alignment Graph in Linear Space 266
BA5L Align Two Strings Using Linear Space 230
BA5M Find a Highest-Scoring Multiple Sequence Alignment 271
BA5N Find a Topological Ordering of a DAG 229
BA6A Implement GreedySorting to Sort a Permutation by Reversals 415
BA6B Compute the Number of Breakpoints in a Permutation 470
BA6C Compute the 2-Break Distance Between a Pair of Genomes 308
BA6D Find a Shortest Transformation of One Genome into Another by 2-Breaks 160
BA6E Find All Shared k-mers of a Pair of Strings 264
BA6F Implement ChromosomeToCycle 205
BA6G Implement CycleToChromosome 200
BA6H Implement ColoredEdges 183
BA6I Implement GraphToGenome 153
BA6J Implement 2-BreakOnGenomeGraph 158
BA6K Implement 2-BreakOnGenome 136
BA7A Compute Distances Between Leaves 245
BA7B Compute Limb Lengths in a Tree 279
BA7C Implement AdditivePhylogeny 243
BA7D Implement UPGMA 196
BA7E Implement the Neighbor Joining Algorithm 184
BA7F Implement SmallParsimony 129
BA7G Adapt SmallParsimony to Unrooted Trees 94
BA8A Implement FarthestFirstTraversal 178
BA8B Compute the Squared Error Distortion 179
BA8C Implement the Lloyd Algorithm for k-Means Clustering 204
BA8D Implement the Soft k-Means Clustering Algorithm 141
BA8E Implement Hierarchical Clustering 147
BA9A Construct a Trie from a Collection of Patterns 348
BA9B Implement TrieMatching 352
BA9C Construct the Suffix Tree of a String 260
BA9D Find the Longest Repeat in a String 321
BA9E Find the Longest Substring Shared by Two Strings 260
BA9F Find the Shortest Non-Shared Substring of Two Strings 214
BA9G Construct the Suffix Array of a String 321
BA9H Pattern Matching with the Suffix Array 231
BA9I Construct the Burrows-Wheeler Transform of a String 363
BA9J Reconstruct a String from its Burrows-Wheeler Transform 310
BA9K Generate the Last-to-First Mapping of a String 250
BA9L Implement BWMatching 230
BA9M Implement BetterBWMatching 202
BA9N Find All Occurrences of a Collection of Patterns in a String 209
BA9O Find All Approximate Occurrences of a Collection of Patterns in a String 191
BA9P Implement TreeColoring 96
BA9Q Construct the Partial Suffix Array of a String 167
BA9R Construct a Suffix Tree from a Suffix Array 124