Problems

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Last win: sktrinh12 vs. “GenBank Introduction”, 21 minutes ago
Problems: 285 (total), users: 79482, attempts: 1303453, correct: 721978
ID Title Solved By Correct Ratio
BA10A Compute the Probability of a Hidden Path 571
BA10B Compute the Probability of an Outcome Given a Hidden Path 477
BA10C Implement the Viterbi Algorithm 279
BA10D Compute the Probability of a String Emitted by an HMM 237
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 102
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 132
BA11B Implement DecodingIdealSpectrum 96
BA11C Convert a Peptide into a Peptide Vector 136
BA11D Convert a Peptide Vector into a Peptide 131
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 1449
BA1B Find the Most Frequent Words in a String 1614
BA1C Find the Reverse Complement of a String 1549
BA1D Find All Occurrences of a Pattern in a String 1442
BA1E Find Patterns Forming Clumps in a String 1145
BA1F Find a Position in a Genome Minimizing the Skew 1154
BA1G Compute the Hamming Distance Between Two Strings 1217
BA1H Find All Approximate Occurrences of a Pattern in a String 1017
BA1I Find the Most Frequent Words with Mismatches in a String 829
BA1J Find Frequent Words with Mismatches and Reverse Complements 755
BA1K Generate the Frequency Array of a String 692
BA1L Implement PatternToNumber 750
BA1M Implement NumberToPattern 716
BA1N Generate the d-Neighborhood of a String 723
BA2A Implement MotifEnumeration 602
BA2B Find a Median String 608
BA2C Find a Profile-most Probable k-mer in a String 613
BA2D Implement GreedyMotifSearch 521
BA2E Implement GreedyMotifSearch with Pseudocounts 459
BA2F Implement RandomizedMotifSearch 375
BA2G Implement GibbsSampler 324
BA2H Implement DistanceBetweenPatternAndStrings 410
BA3A Generate the k-mer Composition of a String 750
BA3B Reconstruct a String from its Genome Path 673
BA3C Construct the Overlap Graph of a Collection of k-mers 625
BA3D Construct the De Bruijn Graph of a String 645
BA3E Construct the De Bruijn Graph of a Collection of k-mers 565
BA3F Find an Eulerian Cycle in a Graph 430
BA3G Find an Eulerian Path in a Graph 364
BA3H Reconstruct a String from its k-mer Composition 394
BA3I Find a k-Universal Circular String 290
BA3J Reconstruct a String from its Paired Composition 251
BA3K Generate Contigs from a Collection of Reads 247
BA3L Construct a String Spelled by a Gapped Genome Path 207
BA3M Generate All Maximal Non-Branching Paths in a Graph 193
BA4A Translate an RNA String into an Amino Acid String 503
BA4B Find Substrings of a Genome Encoding a Given Amino Acid String 398
BA4C Generate the Theoretical Spectrum of a Cyclic Peptide 382
BA4D Compute the Number of Peptides of Given Total Mass 252
BA4E Find a Cyclic Peptide with Theoretical Spectrum Matching an Ideal Spectrum 293
BA4F Compute the Score of a Cyclic Peptide Against a Spectrum 237
BA4G Implement LeaderboardCyclopeptideSequencing 216
BA4H Generate the Convolution of a Spectrum 226
BA4I Implement ConvolutionCyclopeptideSequencing 155
BA4J Generate the Theoretical Spectrum of a Linear Peptide 245
BA4K Compute the Score of a Linear Peptide 195
BA4L Trim a Peptide Leaderboard 173
BA4M Solve the Turnpike Problem 93
BA5A Find the Minimum Number of Coins Needed to Make Change 574
BA5B Find the Length of a Longest Path in a Manhattan-like Grid 456
BA5C Find a Longest Common Subsequence of Two Strings 564
BA5D Find the Longest Path in a DAG 369
BA5E Find a Highest-Scoring Alignment of Two Strings 541
BA5F Find a Highest-Scoring Local Alignment of Two Strings 429
BA5G Compute the Edit Distance Between Two Strings 490
BA5H Find a Highest-Scoring Fitting Alignment of Two Strings 312
BA5I Find a Highest-Scoring Overlap Alignment of Two Strings 275
BA5J Align Two Strings Using Affine Gap Penalties 320
BA5K Find a Middle Edge in an Alignment Graph in Linear Space 201
BA5L Align Two Strings Using Linear Space 177
BA5M Find a Highest-Scoring Multiple Sequence Alignment 210
BA5N Find a Topological Ordering of a DAG 149
BA6A Implement GreedySorting to Sort a Permutation by Reversals 330
BA6B Compute the Number of Breakpoints in a Permutation 365
BA6C Compute the 2-Break Distance Between a Pair of Genomes 243
BA6D Find a Shortest Transformation of One Genome into Another by 2-Breaks 84
BA6E Find All Shared k-mers of a Pair of Strings 220
BA6F Implement ChromosomeToCycle 142
BA6G Implement CycleToChromosome 138
BA6H Implement ColoredEdges 127
BA6I Implement GraphToGenome 105
BA6J Implement 2-BreakOnGenomeGraph 105
BA6K Implement 2-BreakOnGenome 98
BA7A Compute Distances Between Leaves 191
BA7B Compute Limb Lengths in a Tree 197
BA7C Implement AdditivePhylogeny 158
BA7D Implement UPGMA 144
BA7E Implement the Neighbor Joining Algorithm 121
BA7F Implement SmallParsimony 98
BA7G Adapt SmallParsimony to Unrooted Trees 68
BA8A Implement FarthestFirstTraversal 135
BA8B Compute the Squared Error Distortion 129
BA8C Implement the Lloyd Algorithm for k-Means Clustering 139
BA8D Implement the Soft k-Means Clustering Algorithm 106
BA8E Implement Hierarchical Clustering 105
BA9A Construct a Trie from a Collection of Patterns 278
BA9B Implement TrieMatching 251
BA9C Construct the Suffix Tree of a String 189
BA9D Find the Longest Repeat in a String 221
BA9E Find the Longest Substring Shared by Two Strings 200
BA9F Find the Shortest Non-Shared Substring of Two Strings 169
BA9G Construct the Suffix Array of a String 240
BA9H Pattern Matching with the Suffix Array 136
BA9I Construct the Burrows-Wheeler Transform of a String 283
BA9J Reconstruct a String from its Burrows-Wheeler Transform 227
BA9K Generate the Last-to-First Mapping of a String 171
BA9L Implement BWMatching 178
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 101