Problems

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Last win: christinewegler vs. “Counting DNA Nucleotides”, 1 minute ago
Problems: 285 (total), users: 62041, attempts: 1030345, correct: 575793
ID Title Solved By Correct Ratio
BA10A Compute the Probability of a Hidden Path 431
BA10B Compute the Probability of an Outcome Given a Hidden Path 364
BA10C Implement the Viterbi Algorithm 223
BA10D Compute the Probability of a String Emitted by an HMM 197
BA10E Construct a Profile HMM 124
BA10F Construct a Profile HMM with Pseudocounts 115
BA10G Perform a Multiple Sequence Alignment with a Profile HMM 60
BA10H Estimate the Parameters of an HMM 79
BA10I Implement Viterbi Learning 71
BA10J Solve the Soft Decoding Problem 71
BA10K Implement Baum-Welch Learning 57
BA11A Construct the Graph of a Spectrum 103
BA11B Implement DecodingIdealSpectrum 75
BA11C Convert a Peptide into a Peptide Vector 109
BA11D Convert a Peptide Vector into a Peptide 103
BA11E Sequence a Peptide 62
BA11F Find a Highest-Scoring Peptide in a Proteome against a Spectrum 63
BA11G Implement PSMSearch 62
BA11H Compute the Size of a Spectral Dictionary 52
BA11I Compute the Probability of a Spectral Dictionary 53
BA11J Find a Highest-Scoring Modified Peptide against a Spectrum 42
BA1A Compute the Number of Times a Pattern Appears in a Text 941
BA1B Find the Most Frequent Words in a String 1103
BA1C Find the Reverse Complement of a String 1063
BA1D Find All Occurrences of a Pattern in a String 962
BA1E Find Patterns Forming Clumps in a String 753
BA1F Find a Position in a Genome Minimizing the Skew 727
BA1G Compute the Hamming Distance Between Two Strings 804
BA1H Find All Approximate Occurrences of a Pattern in a String 687
BA1I Find the Most Frequent Words with Mismatches in a String 552
BA1J Find Frequent Words with Mismatches and Reverse Complements 497
BA1K Generate the Frequency Array of a String 460
BA1L Implement PatternToNumber 516
BA1M Implement NumberToPattern 481
BA1N Generate the d-Neighborhood of a String 503
BA2A Implement MotifEnumeration 412
BA2B Find a Median String 411
BA2C Find a Profile-most Probable k-mer in a String 433
BA2D Implement GreedyMotifSearch 359
BA2E Implement GreedyMotifSearch with Pseudocounts 303
BA2F Implement RandomizedMotifSearch 245
BA2G Implement GibbsSampler 222
BA2H Implement DistanceBetweenPatternAndStrings 285
BA3A Generate the k-mer Composition of a String 516
BA3B Reconstruct a String from its Genome Path 473
BA3C Construct the Overlap Graph of a Collection of k-mers 421
BA3D Construct the De Bruijn Graph of a String 437
BA3E Construct the De Bruijn Graph of a Collection of k-mers 407
BA3F Find an Eulerian Cycle in a Graph 298
BA3G Find an Eulerian Path in a Graph 250
BA3H Reconstruct a String from its k-mer Composition 247
BA3I Find a k-Universal Circular String 193
BA3J Reconstruct a String from its Paired Composition 178
BA3K Generate Contigs from a Collection of Reads 173
BA3L Construct a String Spelled by a Gapped Genome Path 144
BA3M Generate All Maximal Non-Branching Paths in a Graph 127
BA4A Translate an RNA String into an Amino Acid String 353
BA4B Find Substrings of a Genome Encoding a Given Amino Acid String 261
BA4C Generate the Theoretical Spectrum of a Cyclic Peptide 261
BA4D Compute the Number of Peptides of Given Total Mass 152
BA4E Find a Cyclic Peptide with Theoretical Spectrum Matching an Ideal Spectrum 191
BA4F Compute the Score of a Cyclic Peptide Against a Spectrum 157
BA4G Implement LeaderboardCyclopeptideSequencing 148
BA4H Generate the Convolution of a Spectrum 153
BA4I Implement ConvolutionCyclopeptideSequencing 110
BA4J Generate the Theoretical Spectrum of a Linear Peptide 174
BA4K Compute the Score of a Linear Peptide 135
BA4L Trim a Peptide Leaderboard 119
BA4M Solve the Turnpike Problem 70
BA5A Find the Minimum Number of Coins Needed to Make Change 469
BA5B Find the Length of a Longest Path in a Manhattan-like Grid 379
BA5C Find a Longest Common Subsequence of Two Strings 470
BA5D Find the Longest Path in a DAG 310
BA5E Find a Highest-Scoring Alignment of Two Strings 424
BA5F Find a Highest-Scoring Local Alignment of Two Strings 346
BA5G Compute the Edit Distance Between Two Strings 419
BA5H Find a Highest-Scoring Fitting Alignment of Two Strings 264
BA5I Find a Highest-Scoring Overlap Alignment of Two Strings 241
BA5J Align Two Strings Using Affine Gap Penalties 256
BA5K Find a Middle Edge in an Alignment Graph in Linear Space 170
BA5L Align Two Strings Using Linear Space 149
BA5M Find a Highest-Scoring Multiple Sequence Alignment 171
BA5N Find a Topological Ordering of a DAG 116
BA6A Implement GreedySorting to Sort a Permutation by Reversals 272
BA6B Compute the Number of Breakpoints in a Permutation 297
BA6C Compute the 2-Break Distance Between a Pair of Genomes 196
BA6D Find a Shortest Transformation of One Genome into Another by 2-Breaks 59
BA6E Find All Shared k-mers of a Pair of Strings 202
BA6F Implement ChromosomeToCycle 118
BA6G Implement CycleToChromosome 113
BA6H Implement ColoredEdges 103
BA6I Implement GraphToGenome 84
BA6J Implement 2-BreakOnGenomeGraph 78
BA6K Implement 2-BreakOnGenome 68
BA7A Compute Distances Between Leaves 135
BA7B Compute Limb Lengths in a Tree 143
BA7C Implement AdditivePhylogeny 96
BA7D Implement UPGMA 93
BA7E Implement the Neighbor Joining Algorithm 80
BA7F Implement SmallParsimony 70
BA7G Adapt SmallParsimony to Unrooted Trees 45
BA8A Implement FarthestFirstTraversal 101
BA8B Compute the Squared Error Distortion 97
BA8C Implement the Lloyd Algorithm for k-Means Clustering 104
BA8D Implement the Soft k-Means Clustering Algorithm 85
BA8E Implement Hierarchical Clustering 81
BA9A Construct a Trie from a Collection of Patterns 235
BA9B Implement TrieMatching 207
BA9C Construct the Suffix Tree of a String 160
BA9D Find the Longest Repeat in a String 187
BA9E Find the Longest Substring Shared by Two Strings 177
BA9F Find the Shortest Non-Shared Substring of Two Strings 141
BA9G Construct the Suffix Array of a String 186
BA9H Pattern Matching with the Suffix Array 100
BA9I Construct the Burrows-Wheeler Transform of a String 221
BA9J Reconstruct a String from its Burrows-Wheeler Transform 184
BA9K Generate the Last-to-First Mapping of a String 113
BA9L Implement BWMatching 143
BA9M Implement BetterBWMatching 129
BA9N Find All Occurrences of a Collection of Patterns in a String 141
BA9O Find All Approximate Occurrences of a Collection of Patterns in a String 112
BA9P Implement TreeColoring 56
BA9Q Construct the Partial Suffix Array of a String 114
BA9R Construct a Suffix Tree from a Suffix Array 86