Problems

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Last win: David Parry vs. “Complementing a Strand of DNA”, 5 minutes ago
Problems: 284 (total), users: 42878, attempts: 727659, correct: 411844
ID Title Solved By Correct Ratio
BA10A Compute the Probability of a Hidden Path 236
BA10B Compute the Probability of an Outcome Given a Hidden Path 197
BA10C Implement the Viterbi Algorithm 122
BA10D Compute the Probability of a String Emitted by an HMM 109
BA10E Construct a Profile HMM 80
BA10F Construct a Profile HMM with Pseudocounts 70
BA10G Perform a Multiple Sequence Alignment with a Profile HMM 31
BA10H Estimate the Parameters of an HMM 41
BA10I Implement Viterbi Learning 35
BA10J Solve the Soft Decoding Problem 32
BA10K Implement Baum-Welch Learning 24
BA11A Construct the Graph of a Spectrum 64
BA11B Implement DecodingIdealSpectrum 48
BA11C Convert a Peptide into a Peptide Vector 69
BA11D Convert a Peptide Vector into a Peptide 63
BA11E Sequence a Peptide 41
BA11F Find a Highest-Scoring Peptide in a Proteome against a Spectrum 42
BA11G Implement PSMSearch 39
BA11H Compute the Size of a Spectral Dictionary 35
BA11I Compute the Probability of a Spectral Dictionary 34
BA11J Find a Highest-Scoring Modified Peptide against a Spectrum 26
BA1A Compute the Number of Times a Pattern Appears in a Text 450
BA1B Find the Most Frequent Words in a String 624
BA1C Find the Reverse Complement of a String 563
BA1D Find All Occurrences of a Pattern in a String 532
BA1E Find Patterns Forming Clumps in a String 434
BA1F Find a Position in a Genome Minimizing the Skew 408
BA1G Compute the Hamming Distance Between Two Strings 375
BA1H Find All Approximate Occurrences of a Pattern in a String 418
BA1I Find the Most Frequent Words with Mismatches in a String 325
BA1J Find Frequent Words with Mismatches and Reverse Complements 297
BA1K Generate the Frequency Array of a String 270
BA1L Implement PatternToNumber 281
BA1M Implement NumberToPattern 270
BA1N Generate the d-Neighborhood of a String 299
BA2A Implement MotifEnumeration 258
BA2B Find a Median String 218
BA2C Find a Profile-most Probable k-mer in a String 237
BA2D Implement GreedyMotifSearch 191
BA2E Implement GreedyMotifSearch with Pseudocounts 159
BA2F Implement RandomizedMotifSearch 133
BA2G Implement GibbsSampler 122
BA2H Implement DistanceBetweenPatternAndStrings 157
BA3A Generate the k-mer Composition of a String 258
BA3B Reconstruct a String from its Genome Path 211
BA3C Construct the Overlap Graph of a Collection of k-mers 215
BA3D Construct the De Bruijn Graph of a String 204
BA3E Construct the De Bruijn Graph of a Collection of k-mers 186
BA3F Find an Eulerian Cycle in a Graph 140
BA3G Find an Eulerian Path in a Graph 126
BA3H Reconstruct a String from its k-mer Composition 129
BA3I Find a k-Universal Circular String 106
BA3J Reconstruct a String from its Paired Composition 84
BA3K Generate Contigs from a Collection of Reads 95
BA3L Construct a String Spelled by a Gapped Genome Path 81
BA3M Generate All Maximal Non-Branching Paths in a Graph 83
BA4A Translate an RNA String into an Amino Acid String 189
BA4B Find Substrings of a Genome Encoding a Given Amino Acid String 153
BA4C Generate the Theoretical Spectrum of a Cyclic Peptide 152
BA4D Compute the Number of Peptides of Given Total Mass 73
BA4E Find a Cyclic Peptide with Theoretical Spectrum Matching an Ideal Spectrum 104
BA4F Compute the Score of a Cyclic Peptide Against a Spectrum 92
BA4G Implement LeaderboardCyclopeptideSequencing 87
BA4H Generate the Convolution of a Spectrum 89
BA4I Implement ConvolutionCyclopeptideSequencing 60
BA4J Generate the Theoretical Spectrum of a Linear Peptide 95
BA4K Compute the Score of a Linear Peptide 78
BA4L Trim a Peptide Leaderboard 66
BA4M Solve the Turnpike Problem 39
BA5A Find the Minimum Number of Coins Needed to Make Change 354
BA5B Find the Length of a Longest Path in a Manhattan-like Grid 296
BA5C Find a Longest Common Subsequence of Two Strings 344
BA5D Find the Longest Path in a DAG 244
BA5E Find a Highest-Scoring Alignment of Two Strings 263
BA5F Find a Highest-Scoring Local Alignment of Two Strings 229
BA5G Compute the Edit Distance Between Two Strings 285
BA5H Find a Highest-Scoring Fitting Alignment of Two Strings 181
BA5I Find a Highest-Scoring Overlap Alignment of Two Strings 173
BA5J Align Two Strings Using Affine Gap Penalties 159
BA5K Find a Middle Edge in an Alignment Graph in Linear Space 118
BA5L Align Two Strings Using Linear Space 100
BA5M Find a Highest-Scoring Multiple Sequence Alignment 123
BA5N Find a Topological Ordering of a DAG 70
BA6A Implement GreedySorting to Sort a Permutation by Reversals 220
BA6B Compute the Number of Breakpoints in a Permutation 235
BA6C Compute the 2-Break Distance Between a Pair of Genomes 155
BA6D Find a Shortest Transformation of One Genome into Another by 2-Breaks 32
BA6E Find All Shared k-mers of a Pair of Strings 163
BA6F Implement ChromosomeToCycle 78
BA6G Implement CycleToChromosome 73
BA6H Implement ColoredEdges 69
BA6I Implement GraphToGenome 54
BA6J Implement 2-BreakOnGenomeGraph 52
BA6K Implement 2-BreakOnGenome 38
BA7A Compute Distances Between Leaves 94
BA7B Compute Limb Lengths in a Tree 88
BA7C Implement AdditivePhylogeny 59
BA7D Implement UPGMA 53
BA7E Implement the Neighbor Joining Algorithm 47
BA7F Implement SmallParsimony 40
BA7G Adapt SmallParsimony to Unrooted Trees 26
BA8A Implement FarthestFirstTraversal 62
BA8B Compute the Squared Error Distortion 60
BA8C Implement the Lloyd Algorithm for k-Means Clustering 59
BA8D Implement the Soft k-Means Clustering Algorithm 56
BA8E Implement Hierarchical Clustering 47
BA9A Construct a Trie from a Collection of Patterns 187
BA9B Implement TrieMatching 164
BA9C Construct the Suffix Tree of a String 127
BA9D Find the Longest Repeat in a String 142
BA9E Find the Longest Substring Shared by Two Strings 137
BA9F Find the Shortest Non-Shared Substring of Two Strings 107
BA9G Construct the Suffix Array of a String 143
BA9H Pattern Matching with the Suffix Array 65
BA9I Construct the Burrows-Wheeler Transform of a String 166
BA9J Reconstruct a String from its Burrows-Wheeler Transform 138
BA9K Generate the Last-to-First Mapping of a String 60
BA9L Implement BWMatching 105
BA9M Implement BetterBWMatching 100
BA9N Find All Occurrences of a Collection of Patterns in a String 113
BA9O Find All Approximate Occurrences of a Collection of Patterns in a String 86
BA9P Implement TreeColoring 36
BA9Q Construct the Partial Suffix Array of a String 87
BA9R Construct a Suffix Tree from a Suffix Array 63