Problems

Rosalind is a platform for learning bioinformatics and programming through problem solving. Take a tour to get the hang of how Rosalind works.

Problems: 285 (total), users: 73225, attempts: 1199874, correct: 666617
ID Title Solved By Correct Ratio
BA10A Compute the Probability of a Hidden Path 507
BA10B Compute the Probability of an Outcome Given a Hidden Path 430
BA10C Implement the Viterbi Algorithm 260
BA10D Compute the Probability of a String Emitted by an HMM 220
BA10E Construct a Profile HMM 135
BA10F Construct a Profile HMM with Pseudocounts 124
BA10G Perform a Multiple Sequence Alignment with a Profile HMM 69
BA10H Estimate the Parameters of an HMM 93
BA10I Implement Viterbi Learning 79
BA10J Solve the Soft Decoding Problem 85
BA10K Implement Baum-Welch Learning 67
BA11A Construct the Graph of a Spectrum 116
BA11B Implement DecodingIdealSpectrum 88
BA11C Convert a Peptide into a Peptide Vector 121
BA11D Convert a Peptide Vector into a Peptide 116
BA11E Sequence a Peptide 71
BA11F Find a Highest-Scoring Peptide in a Proteome against a Spectrum 70
BA11G Implement PSMSearch 68
BA11H Compute the Size of a Spectral Dictionary 58
BA11I Compute the Probability of a Spectral Dictionary 57
BA11J Find a Highest-Scoring Modified Peptide against a Spectrum 45
BA1A Compute the Number of Times a Pattern Appears in a Text 1243
BA1B Find the Most Frequent Words in a String 1410
BA1C Find the Reverse Complement of a String 1373
BA1D Find All Occurrences of a Pattern in a String 1270
BA1E Find Patterns Forming Clumps in a String 995
BA1F Find a Position in a Genome Minimizing the Skew 1010
BA1G Compute the Hamming Distance Between Two Strings 1054
BA1H Find All Approximate Occurrences of a Pattern in a String 881
BA1I Find the Most Frequent Words with Mismatches in a String 725
BA1J Find Frequent Words with Mismatches and Reverse Complements 662
BA1K Generate the Frequency Array of a String 613
BA1L Implement PatternToNumber 664
BA1M Implement NumberToPattern 631
BA1N Generate the d-Neighborhood of a String 639
BA2A Implement MotifEnumeration 533
BA2B Find a Median String 544
BA2C Find a Profile-most Probable k-mer in a String 554
BA2D Implement GreedyMotifSearch 466
BA2E Implement GreedyMotifSearch with Pseudocounts 407
BA2F Implement RandomizedMotifSearch 327
BA2G Implement GibbsSampler 280
BA2H Implement DistanceBetweenPatternAndStrings 371
BA3A Generate the k-mer Composition of a String 666
BA3B Reconstruct a String from its Genome Path 595
BA3C Construct the Overlap Graph of a Collection of k-mers 560
BA3D Construct the De Bruijn Graph of a String 569
BA3E Construct the De Bruijn Graph of a Collection of k-mers 495
BA3F Find an Eulerian Cycle in a Graph 383
BA3G Find an Eulerian Path in a Graph 325
BA3H Reconstruct a String from its k-mer Composition 348
BA3I Find a k-Universal Circular String 253
BA3J Reconstruct a String from its Paired Composition 219
BA3K Generate Contigs from a Collection of Reads 224
BA3L Construct a String Spelled by a Gapped Genome Path 184
BA3M Generate All Maximal Non-Branching Paths in a Graph 175
BA4A Translate an RNA String into an Amino Acid String 443
BA4B Find Substrings of a Genome Encoding a Given Amino Acid String 356
BA4C Generate the Theoretical Spectrum of a Cyclic Peptide 338
BA4D Compute the Number of Peptides of Given Total Mass 223
BA4E Find a Cyclic Peptide with Theoretical Spectrum Matching an Ideal Spectrum 254
BA4F Compute the Score of a Cyclic Peptide Against a Spectrum 206
BA4G Implement LeaderboardCyclopeptideSequencing 191
BA4H Generate the Convolution of a Spectrum 195
BA4I Implement ConvolutionCyclopeptideSequencing 136
BA4J Generate the Theoretical Spectrum of a Linear Peptide 213
BA4K Compute the Score of a Linear Peptide 167
BA4L Trim a Peptide Leaderboard 151
BA4M Solve the Turnpike Problem 81
BA5A Find the Minimum Number of Coins Needed to Make Change 537
BA5B Find the Length of a Longest Path in a Manhattan-like Grid 427
BA5C Find a Longest Common Subsequence of Two Strings 535
BA5D Find the Longest Path in a DAG 344
BA5E Find a Highest-Scoring Alignment of Two Strings 518
BA5F Find a Highest-Scoring Local Alignment of Two Strings 411
BA5G Compute the Edit Distance Between Two Strings 467
BA5H Find a Highest-Scoring Fitting Alignment of Two Strings 293
BA5I Find a Highest-Scoring Overlap Alignment of Two Strings 262
BA5J Align Two Strings Using Affine Gap Penalties 305
BA5K Find a Middle Edge in an Alignment Graph in Linear Space 189
BA5L Align Two Strings Using Linear Space 168
BA5M Find a Highest-Scoring Multiple Sequence Alignment 199
BA5N Find a Topological Ordering of a DAG 135
BA6A Implement GreedySorting to Sort a Permutation by Reversals 317
BA6B Compute the Number of Breakpoints in a Permutation 350
BA6C Compute the 2-Break Distance Between a Pair of Genomes 233
BA6D Find a Shortest Transformation of One Genome into Another by 2-Breaks 79
BA6E Find All Shared k-mers of a Pair of Strings 214
BA6F Implement ChromosomeToCycle 133
BA6G Implement CycleToChromosome 129
BA6H Implement ColoredEdges 118
BA6I Implement GraphToGenome 96
BA6J Implement 2-BreakOnGenomeGraph 95
BA6K Implement 2-BreakOnGenome 91
BA7A Compute Distances Between Leaves 170
BA7B Compute Limb Lengths in a Tree 173
BA7C Implement AdditivePhylogeny 138
BA7D Implement UPGMA 130
BA7E Implement the Neighbor Joining Algorithm 106
BA7F Implement SmallParsimony 88
BA7G Adapt SmallParsimony to Unrooted Trees 57
BA8A Implement FarthestFirstTraversal 121
BA8B Compute the Squared Error Distortion 112
BA8C Implement the Lloyd Algorithm for k-Means Clustering 125
BA8D Implement the Soft k-Means Clustering Algorithm 100
BA8E Implement Hierarchical Clustering 96
BA9A Construct a Trie from a Collection of Patterns 264
BA9B Implement TrieMatching 237
BA9C Construct the Suffix Tree of a String 180
BA9D Find the Longest Repeat in a String 209
BA9E Find the Longest Substring Shared by Two Strings 191
BA9F Find the Shortest Non-Shared Substring of Two Strings 158
BA9G Construct the Suffix Array of a String 222
BA9H Pattern Matching with the Suffix Array 126
BA9I Construct the Burrows-Wheeler Transform of a String 268
BA9J Reconstruct a String from its Burrows-Wheeler Transform 215
BA9K Generate the Last-to-First Mapping of a String 145
BA9L Implement BWMatching 168
BA9M Implement BetterBWMatching 153
BA9N Find All Occurrences of a Collection of Patterns in a String 161
BA9O Find All Approximate Occurrences of a Collection of Patterns in a String 131
BA9P Implement TreeColoring 65
BA9Q Construct the Partial Suffix Array of a String 128
BA9R Construct a Suffix Tree from a Suffix Array 94