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Add relative-distance (#2424)
* Add `relative-distance` * Apply code review * Update generator template
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‎config.json

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],
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"difficulty": 6
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},
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{
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"slug": "relative-distance",
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"name": "Relative Distance",
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"uuid": "4f4229ce-5a2a-415c-a682-6a56cf3846ac",
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"practices": [
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"constructors",
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"dictionaries"
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],
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"prerequisites": [
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"arrays",
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"classes",
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"constructors",
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"dictionaries"
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],
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"difficulty": 5
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},
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{
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"slug": "split-second-stopwatch",
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"name": "Split-Second Stopwatch",

‎exercises/Exercises.sln

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@@ -367,6 +367,8 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "swift-scheduling", "swift-s
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EndProject
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SwiftScheduling", "practice\swift-scheduling\SwiftScheduling.csproj", "{9A073412-4B64-48EB-A346-A56DE6847CCC}"
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EndProject
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "RelativeDistance", "practice\relative-distance\RelativeDistance.csproj", "{2C37454E-8624-47B8-A09B-ADE201C2B04C}"
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EndProject
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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Debug|Any CPU = Debug|Any CPU
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{9A073412-4B64-48EB-A346-A56DE6847CCC}.Release|x64.Build.0 = Release|Any CPU
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{9A073412-4B64-48EB-A346-A56DE6847CCC}.Release|x86.ActiveCfg = Release|Any CPU
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{9A073412-4B64-48EB-A346-A56DE6847CCC}.Release|x86.Build.0 = Release|Any CPU
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{2C37454E-8624-47B8-A09B-ADE201C2B04C}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{2C37454E-8624-47B8-A09B-ADE201C2B04C}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{2C37454E-8624-47B8-A09B-ADE201C2B04C}.Debug|x64.ActiveCfg = Debug|Any CPU
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{2C37454E-8624-47B8-A09B-ADE201C2B04C}.Debug|x64.Build.0 = Debug|Any CPU
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{2C37454E-8624-47B8-A09B-ADE201C2B04C}.Debug|x86.ActiveCfg = Debug|Any CPU
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{2C37454E-8624-47B8-A09B-ADE201C2B04C}.Debug|x86.Build.0 = Debug|Any CPU
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{2C37454E-8624-47B8-A09B-ADE201C2B04C}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{2C37454E-8624-47B8-A09B-ADE201C2B04C}.Release|Any CPU.Build.0 = Release|Any CPU
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{2C37454E-8624-47B8-A09B-ADE201C2B04C}.Release|x64.ActiveCfg = Release|Any CPU
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{2C37454E-8624-47B8-A09B-ADE201C2B04C}.Release|x64.Build.0 = Release|Any CPU
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{2C37454E-8624-47B8-A09B-ADE201C2B04C}.Release|x86.ActiveCfg = Release|Any CPU
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{2C37454E-8624-47B8-A09B-ADE201C2B04C}.Release|x86.Build.0 = Release|Any CPU
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EndGlobalSection
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GlobalSection(SolutionProperties) = preSolution
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HideSolutionNode = FALSE
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{1BA5F72A-ED8E-48A8-8FD6-0F567BDCBD9E} = {E276EF69-669A-43E0-88AC-8ABB17A9C026}
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{FA726133-BC1C-D753-28C5-C9ACB44C0776} = {E276EF69-669A-43E0-88AC-8ABB17A9C026}
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{9A073412-4B64-48EB-A346-A56DE6847CCC} = {FA726133-BC1C-D753-28C5-C9ACB44C0776}
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{2C37454E-8624-47B8-A09B-ADE201C2B04C} = {E276EF69-669A-43E0-88AC-8ABB17A9C026}
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EndGlobalSection
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GlobalSection(ExtensibilityGlobals) = postSolution
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SolutionGuid = {AB4EA6C9-5461-4024-BDC7-2AE0C3A85CD1}

‎exercises/practice/relative-distance/.docs/instructions.md

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# Instructions
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Your task is to determine the degree of separation between two individuals in a family tree.
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- You will be given an input, with all parent names and their children.
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- Each name is unique, a child _can_ have one or two parents.
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- The degree of separation is defined as the shortest number of connections from one person to another.
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- If two individuals are not connected, return a value that represents "no known relationship."
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Please see the test cases for the actual implementation.
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## Example
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Given the following family tree:
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```text
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┌──────────┐ ┌──────────┐ ┌───────────┐
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│ Helena │ │ Erdős │ │ Shusaku │
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└───┬───┬──┘ └─────┬────┘ └──────┬────┘
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┌───┘ └───────┐ └──────┬──────┘
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▼ ▼ ▼
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┌──────────┐ ┌────────┐ ┌──────────┐
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│ Isla │ │ Tariq │ │ Kevin │
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└────┬─────┘ └────┬───┘ └──────────┘
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▼ ▼
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┌─────────┐ ┌────────┐
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│ Uma │ │ Morphy │
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└─────────┘ └────────┘
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```
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The degree of separation between Tariq and Uma is 3 (Tariq → Helena → Isla → Uma).
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There's no known relationship between Isla and [Kevin][six-bacons], as there is no connection in the given data.
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The degree of separation between Uma and Isla is 1.
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~~~~exercism/note
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Isla and Tariq are siblings and have a separation of 1.
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Similarly, this implementation would report a separation of 2 from you to your father's brother.
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~~~~
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[six-bacons]: https://en.m.wikipedia.org/wiki/Six_Degrees_of_Kevin_Bacon

‎exercises/practice/relative-distance/.docs/introduction.md

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# Introduction
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You've been hired to develop **Noble Knots**, the hottest new dating app for nobility!
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With centuries of royal intermarriage, things have gotten… _complicated_.
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To avoid any _oops-we're-twins_ situations, your job is to build a system that checks how closely two people are related.
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Noble Knots is inspired by Iceland's "[Islendinga-App][islendiga-app]," which is backed up by a database that traces all known family connections between Icelanders from the time of the settlement of Iceland.
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Your algorithm will determine the **degree of separation** between two individuals in the royal family tree.
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Will your app help crown a perfect match?
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[islendiga-app]: http://www.islendingaapp.is/information-in-english/

‎exercises/practice/relative-distance/.editorconfig

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###############################
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# Core EditorConfig Options #
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###############################
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; This file is for unifying the coding style for different editors and IDEs.
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; More information at:
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; https://docs.microsoft.com/en-us/visualstudio/ide/editorconfig-code-style-settings-reference?view=vs-2017
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; https://docs.microsoft.com/en-us/visualstudio/ide/create-portable-custom-editor-options?view=vs-2017
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root = true
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[*]
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indent_style = space
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[RelativeDistance.cs]
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indent_size = 4
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###############################
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# .NET Coding Conventions #
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###############################
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# Organize usings
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dotnet_sort_system_directives_first = true
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dotnet_separate_import_directive_groups = true
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# this. preferences
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dotnet_style_qualification_for_field = false:suggestion
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dotnet_style_qualification_for_property = false:suggestion
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dotnet_style_qualification_for_method = false:suggestion
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dotnet_style_qualification_for_event = false:suggestion
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# Language keywords vs BCL types preferences
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dotnet_style_predefined_type_for_locals_parameters_members = true:suggestion
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dotnet_style_predefined_type_for_member_access = true:suggestion
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# Parentheses preferences
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dotnet_style_parentheses_in_arithmetic_binary_operators = never_if_unnecessary:none
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dotnet_style_parentheses_in_relational_binary_operators = never_if_unnecessary:none
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dotnet_style_parentheses_in_other_binary_operators = never_if_unnecessary:none
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dotnet_style_parentheses_in_other_operators = never_if_unnecessary:suggestion
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# Modifier preferences
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dotnet_style_require_accessibility_modifiers = always:suggestion
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dotnet_style_readonly_field = true:suggestion
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# Expression-level preferences
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dotnet_style_object_initializer = true:suggestion
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dotnet_style_collection_initializer = true:suggestion
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dotnet_style_explicit_tuple_names = true:suggestion
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dotnet_style_prefer_inferred_tuple_names = true:suggestion
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dotnet_style_prefer_inferred_anonymous_type_member_names = true:suggestion
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dotnet_style_prefer_auto_properties = true:suggestion
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dotnet_style_prefer_is_null_check_over_reference_equality_method = true:suggestion
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dotnet_style_prefer_conditional_expression_over_assignment = true:suggestion
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dotnet_style_prefer_conditional_expression_over_return = true:suggestion
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dotnet_style_coalesce_expression = true:suggestion
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dotnet_style_null_propagation = true:suggestion
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###############################
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# Naming Conventions #
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###############################
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# Style Definitions
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dotnet_naming_style.pascal_case_style.capitalization = pascal_case
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# Use PascalCase for constant fields
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dotnet_naming_rule.constant_fields_should_be_pascal_case.severity = suggestion
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dotnet_naming_rule.constant_fields_should_be_pascal_case.symbols = constant_fields
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dotnet_naming_rule.constant_fields_should_be_pascal_case.style = pascal_case_style
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dotnet_naming_symbols.constant_fields.applicable_kinds = field
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dotnet_naming_symbols.constant_fields.applicable_accessibilities = *
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dotnet_naming_symbols.constant_fields.required_modifiers = const
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###############################
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# C# Code Style Rules #
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###############################
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# var preferences
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csharp_style_var_for_built_in_types = true:none
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csharp_style_var_when_type_is_apparent = true:none
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csharp_style_var_elsewhere = true:none
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# Expression-bodied members
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csharp_style_expression_bodied_methods = true:suggestion
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csharp_style_expression_bodied_constructors = true:suggestion
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csharp_style_expression_bodied_operators = true:suggestion
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csharp_style_expression_bodied_properties = true:suggestion
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csharp_style_expression_bodied_indexers = true:suggestion
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csharp_style_expression_bodied_accessors = true:suggestion
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# Pattern-matching preferences
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csharp_style_pattern_matching_over_is_with_cast_check = true:suggestion
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csharp_style_pattern_matching_over_as_with_null_check = true:suggestion
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# Null-checking preferences
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csharp_style_throw_expression = true:suggestion
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csharp_style_conditional_delegate_call = true:suggestion
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# Modifier preferences
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csharp_preferred_modifier_order = public,private,protected,internal,static,extern,new,virtual,abstract,sealed,override,readonly,unsafe,volatile,async:suggestion
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# Expression-level preferences
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csharp_prefer_braces = true:none
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csharp_prefer_simple_default_expression = true:suggestion
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csharp_style_deconstructed_variable_declaration = true:suggestion
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csharp_style_pattern_local_over_anonymous_function = true:suggestion
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csharp_style_inlined_variable_declaration = true:suggestion
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###############################
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# C# Formatting Rules #
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###############################
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# New line preferences
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csharp_new_line_before_open_brace = all
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csharp_new_line_before_else = true
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csharp_new_line_before_catch = true
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csharp_new_line_before_finally = true
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csharp_new_line_before_members_in_object_initializers = false
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csharp_new_line_before_members_in_anonymous_types = false
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csharp_new_line_between_query_expression_clauses = true
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# Indentation preferences
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csharp_indent_case_contents = true
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csharp_indent_switch_labels = true
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csharp_indent_labels = flush_left
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# Space preferences
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csharp_space_after_cast = false
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csharp_space_after_keywords_in_control_flow_statements = true
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csharp_space_between_method_declaration_parameter_list_parentheses = false
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csharp_space_between_method_call_parameter_list_parentheses = false
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csharp_space_before_colon_in_inheritance_clause = true
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csharp_space_after_colon_in_inheritance_clause = true
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csharp_space_around_binary_operators = before_and_after
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csharp_space_between_method_declaration_empty_parameter_list_parentheses = false
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csharp_space_between_method_call_name_and_opening_parenthesis = false
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csharp_space_between_method_call_empty_parameter_list_parentheses = false
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# Wrapping preferences
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csharp_preserve_single_line_blocks = true
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csharp_preserve_single_line_statements = true

‎exercises/practice/relative-distance/.meta/Example.cs

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public class RelativeDistance
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{
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private readonly Dictionary<string, HashSet<string>> relatives;
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public RelativeDistance(Dictionary<string, string[]> familyTree)
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{
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Dictionary<string, HashSet<string>> parsed = new();
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foreach (var (parent, children) in familyTree)
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{
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var parentConnections = parsed.GetValueOrDefault(parent, []);
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foreach (string child in children)
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{
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parentConnections.Add(child);
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var childConnections = parsed.GetValueOrDefault(child, [])
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.Union(children.Where(sibling => sibling != child)).ToHashSet();
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childConnections.Add(parent);
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parsed[child] = childConnections;
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}
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parsed[parent] = parentConnections;
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}
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relatives = parsed;
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}
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public int DegreeOfSeparation(string personA, string personB)
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{
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if (!relatives.ContainsKey(personA) || !relatives.ContainsKey(personB))
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{
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return -1;
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}
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Queue<(string Person, int Degree)> queue = new();
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queue.Enqueue((personA, 0));
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HashSet<string> visited = [personA];
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while (queue.Count > 0)
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{
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var (currentPerson, degree) = queue.Dequeue();
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if (currentPerson == personB)
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{
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return degree;
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}
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var unvisited = relatives[currentPerson].Except(visited).ToHashSet();
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foreach (string neighbor in unvisited)
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{
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queue.Enqueue((neighbor, degree + 1));
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}
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visited.UnionWith(unvisited);
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}
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return -1;
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}
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}

‎exercises/practice/relative-distance/.meta/Generator.tpl

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public class {{ testClass }}
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{
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{{- for test in tests }}
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[Fact{{ if !for.first }}(Skip = "Remove this Skip property to run this test"){{ end }}]
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public void {{ test.testMethod }}()
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{
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Dictionary<string, string[]> familyTree = new()
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{
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{{- for entry in test.input.familyTree }}
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{ "{{ entry.key }}", [{{ for name in entry.value }}"{{ name }}"{{ if !for.last }}, {{ end }}{{ end }}] }{{ if !for.last }},{{ end }}
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{{- end }}
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};
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RelativeDistance rd = new(familyTree);
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Assert.Equal({{ if test.expected }}{{ test.expected }}{{ else }}{{ -1 }}{{ end }}, rd.DegreeOfSeparation({{ test.input.personA | string.literal }}, {{ test.input.personB | string.literal }}));
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}
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{{ end -}}
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}

‎exercises/practice/relative-distance/.meta/config.json

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{
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"authors": [
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"BNAndras"
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],
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"files": {
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"solution": [
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"RelativeDistance.cs"
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],
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"test": [
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"RelativeDistanceTests.cs"
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],
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"example": [
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".meta/Example.cs"
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]
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},
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"blurb": "Given a family tree, calculate the degree of separation.",
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"source": "vaeng",
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"source_url": "https://github.com/exercism/problem-specifications/pull/2537"
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}

‎exercises/practice/relative-distance/.meta/tests.toml

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# This is an auto-generated file.
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#
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# Regenerating this file via `configlet sync` will:
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# - Recreate every `description` key/value pair
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# - Recreate every `reimplements` key/value pair, where they exist in problem-specifications
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# - Remove any `include = true` key/value pair (an omitted `include` key implies inclusion)
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# - Preserve any other key/value pair
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#
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# As user-added comments (using the # character) will be removed when this file
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# is regenerated, comments can be added via a `comment` key.
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[4a1ded74-5d32-47fb-8ae5-321f51d06b5b]
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description = "Direct parent-child relation"
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[30d17269-83e9-4f82-a0d7-8ef9656d8dce]
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description = "Sibling relationship"
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[8dffa27d-a8ab-496d-80b3-2f21c77648b5]
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description = "Two degrees of separation, grandchild"
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[34e56ec1-d528-4a42-908e-020a4606ee60]
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description = "Unrelated individuals"
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[93ffe989-bad2-48c4-878f-3acb1ce2611b]
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description = "Complex graph, cousins"
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[2cc2e76b-013a-433c-9486-1dbe29bf06e5]
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description = "Complex graph, no shortcut, far removed nephew"
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[46c9fbcb-e464-455f-a718-049ea3c7400a]
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description = "Complex graph, some shortcuts, cross-down and cross-up, cousins several times removed, with unrelated family tree"

‎exercises/practice/relative-distance/RelativeDistance.cs

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public class RelativeDistance
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{
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public RelativeDistance(Dictionary<string, string[]> familyTree)
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{
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throw new NotImplementedException("You need to implement this method.");
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}
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public int DegreeOfSeparation(string personA, string personB)
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{
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throw new NotImplementedException("You need to implement this method.");
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}
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}

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