feat(solutions): add a-phone-code/c/function

.editorconfig

@@ -10,7 +10,7 @@ charset = utf-8
 trim_trailing_whitespace = true
 insert_final_newline = true
 
-[*.{py,cs,rs,java}]
+[*.{py,cs,rs,java,md}]
 indent_size = 4
 
 [*.txt]

.github/ISSUE_TEMPLATE/BUG.md

@@ -6,8 +6,8 @@ labels: "bug"
 ---
 
 <!--
-  Please provide a clear and concise description of what the bug is. Include
+Please provide a clear and concise description of what the bug is. Include
-  screenshots if needed. Please make sure your issue has not already been fixed.
+screenshots if needed. Please make sure your issue has not already been fixed.
 -->
 
 ## Steps To Reproduce

.github/workflows/challenges.yml

@@ -21,7 +21,7 @@ jobs:
           SKIP_LOGIN: true
 
       - name: "Setup Node.js"
-        uses: "actions/setup-node@v4.1.0"
+        uses: "actions/setup-node@v4.4.0"
         with:
           node-version: "lts/*"
           cache: "npm"

.github/workflows/cli.yml

@@ -13,7 +13,7 @@ jobs:
       - uses: "actions/checkout@v4.2.2"
 
       - name: "Setup Node.js"
-        uses: "actions/setup-node@v4.1.0"
+        uses: "actions/setup-node@v4.4.0"
         with:
           node-version: "lts/*"
           cache: "npm"
@@ -32,7 +32,7 @@ jobs:
       - uses: "actions/checkout@v4.2.2"
 
       - name: "Setup Node.js"
-        uses: "actions/setup-node@v4.1.0"
+        uses: "actions/setup-node@v4.4.0"
         with:
           node-version: "lts/*"
           cache: "npm"
@@ -56,7 +56,7 @@ jobs:
           SKIP_LOGIN: true
 
       - name: "Setup Node.js"
-        uses: "actions/setup-node@v4.1.0"
+        uses: "actions/setup-node@v4.4.0"
         with:
           node-version: "lts/*"
           cache: "npm"

.gitignore

@@ -28,3 +28,6 @@ coverage
 .DS_Store
 temp
 tmp
+
+# typescript
+*.tsbuildinfo

.markdownlint-cli2.jsonc

@@ -1,12 +0,0 @@
-{
-  "config": {
-    "extends": "markdownlint/style/prettier",
-    "default": true,
-    "relative-links": true,
-    "no-duplicate-heading": false,
-    "no-inline-html": false,
-  },
-  "globs": ["**/*.md"],
-  "ignores": ["**/node_modules"],
-  "customRules": ["markdownlint-rule-relative-links"],
-}

.markdownlint-cli2.mjs

@@ -0,0 +1,19 @@
+import relativeLinksRule, { markdownIt } from "markdownlint-rule-relative-links"
+
+const config = {
+  config: {
+    extends: "markdownlint/style/prettier",
+    default: true,
+    "relative-links": true,
+    "no-duplicate-heading": false,
+    "no-inline-html": false,
+  },
+  globs: ["**/*.md"],
+  ignores: ["**/node_modules"],
+  customRules: [relativeLinksRule],
+  markdownItFactory: () => {
+    return markdownIt
+  },
+}
+
+export default config

.npmrc

@@ -1 +0,0 @@
-save-exact = true

CODE_OF_CONDUCT.md

@@ -20,21 +20,16 @@ community include:
 - Demonstrating empathy and kindness toward other people
 - Being respectful of differing opinions, viewpoints, and experiences
 - Giving and gracefully accepting constructive feedback
-- Accepting responsibility and apologizing to those affected by our mistakes,
+- Accepting responsibility and apologizing to those affected by our mistakes, and learning from the experience
-  and learning from the experience
+- Focusing on what is best not just for us as individuals, but for the overall community
-- Focusing on what is best not just for us as individuals, but for the
-  overall community
 
 Examples of unacceptable behavior include:
 
-- The use of sexualized language or imagery, and sexual attention or
+- The use of sexualized language or imagery, and sexual attention or advances of any kind
-  advances of any kind
 - Trolling, insulting or derogatory comments, and personal or political attacks
 - Public or private harassment
-- Publishing others' private information, such as a physical or email
+- Publishing others' private information, such as a physical or email address, without their explicit permission
-  address, without their explicit permission
+- Other conduct which could reasonably be considered inappropriate in a professional setting
-- Other conduct which could reasonably be considered inappropriate in a
-  professional setting
 
 ## Enforcement Responsibilities
 

README.md

@@ -80,17 +80,20 @@ programming-challenges --help
 # Generate a new challenge
 programming-challenges generate challenge --github-user="YourGitHubName" --challenge="hello-world"
 
+# Search for a challenge not yet solved in a specific programming language
+programming-challenges search --language="rust"
+
 # Generate a new solution
 programming-challenges generate solution --github-user="YourGitHubName" --challenge="hello-world" --solution="function" --language="python"
 
-# Test a solution
-programming-challenges run test --challenge="hello-world" --solution="function" --language="python"
-
 # Run a solution with specific `input.txt` file
 programming-challenges run solution --challenge="hello-world" --solution="function" --language="python" --input-path="./challenges/hello-world/test/1/input.txt" --output
 
-# Search for a challenge not yet solved in a specific programming language
+# Test a solution
-programming-challenges search --language="rust"
+programming-challenges run test --challenge="hello-world" --solution="function" --language="python"
+
+# Test all the solutions in all the challenges
+programming-challenges run test --all
 ```
 
 ## 💡 Contributing

challenges/a-phone-code/README.md

@@ -0,0 +1,25 @@
+# a-phone-code
+
+Created by [@theoludwig](https://github.com/theoludwig) on 13 May 2025.
+
+## Instructions
+
+Polycarpus has n friends in Tarasov city. Polycarpus knows phone numbers of all his friends: they are strings s1, s2, ..., sn. All these strings consist only of digits and have the same length.
+
+Once Polycarpus needed to figure out Tarasov city phone code. He assumed that the phone code of the city is the longest common prefix of all phone numbers of his friends. In other words, it is the longest string c which is a prefix (the beginning) of each si for all i. Help Polycarpus determine the length of the city phone code.
+
+### Input
+
+The first line of the input contains an integer n — the number of Polycarpus's friends. The following n lines contain strings — the phone numbers of Polycarpus's friends. It is guaranteed that all strings consist only of digits and have the same length from 1 to 20, inclusive. It is also guaranteed that all strings are different.
+
+### Output
+
+Print the number of digits in the city phone code.
+
+## Source
+
+[Codeforces - A. Phone Code](https://codeforces.com/problemset/problem/172/A)
+
+## Examples
+
+See the `test` folder for examples of input/output.

challenges/a-phone-code/solutions/c/function/README.md

@@ -0,0 +1,3 @@
+# a-phone-code/c/function
+
+Created by [@theoludwig](https://github.com/theoludwig) on 13 May 2025.

challenges/a-phone-code/solutions/c/function/character.c

@@ -0,0 +1,7 @@
+#include "character.h"
+
+void character_append(char* string, char character) {
+  size_t length = strlen(string);
+  string[length] = character;
+  string[length + 1] = '\0';
+}

challenges/a-phone-code/solutions/c/function/character.h

@@ -0,0 +1,16 @@
+#ifndef __CHARACTER__
+#define __CHARACTER__
+
+#include <stdlib.h>
+#include <string.h>
+
+/**
+ * @brief Append a character to a string, assuming string points to an array
+ * with enough space.
+ *
+ * @param string
+ * @param character
+ */
+void character_append(char* string, char character);
+
+#endif

challenges/a-phone-code/solutions/c/function/input.c

@@ -0,0 +1,14 @@
+#include "input.h"
+
+char* input() {
+  char character;
+  size_t length = 1;
+  char* string = malloc(length * sizeof(char));
+  *string = '\0';
+  while ((character = getchar()) != '\n' && character != EOF) {
+    length++;
+    string = realloc(string, length * sizeof(char));
+    character_append(string, character);
+  }
+  return string;
+}

challenges/a-phone-code/solutions/c/function/input.h

@@ -0,0 +1,16 @@
+#ifndef __INPUT__
+#define __INPUT__
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "character.h"
+
+/**
+ * @brief Read a line from stdin.
+ *
+ * @return char*
+ */
+char* input();
+
+#endif

challenges/a-phone-code/solutions/c/function/solution.c

@@ -0,0 +1,40 @@
+#include <errno.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "input.h"
+
+int main() {
+  size_t count = (size_t)atoi(input());
+  size_t prefix_length = 0;
+
+  char* last = NULL;
+  for (size_t i = 1; i < count; i++) {
+    if (last == NULL) {
+      last = input();
+    }
+    char* current = input();
+
+    size_t prefix_current_length = 0;
+    for (size_t j = 0; j < strlen(current); j++) {
+      if (current[j] == last[j]) {
+        prefix_current_length += 1;
+      } else {
+        break;
+      }
+    }
+
+    if (prefix_length > prefix_current_length) {
+      prefix_length = prefix_current_length;
+    } else if (prefix_length == 0) {
+      prefix_length = prefix_current_length;
+    }
+
+    last = current;
+  }
+
+  printf("%ld\n", prefix_length);
+  return EXIT_SUCCESS;
+}

challenges/a-phone-code/test/1/input.txt

@@ -0,0 +1,5 @@
+4
+00209
+00219
+00999
+00909

challenges/a-phone-code/test/1/output.txt

@@ -0,0 +1 @@
+2

challenges/a-phone-code/test/2/input.txt

@@ -0,0 +1,3 @@
+2
+1
+2

challenges/a-phone-code/test/2/output.txt

@@ -0,0 +1 @@
+0

challenges/a-phone-code/test/3/input.txt

@@ -0,0 +1,4 @@
+3
+77012345678999999999
+77012345678901234567
+77012345678998765432

challenges/a-phone-code/test/3/output.txt

@@ -0,0 +1 @@
+12

challenges/cakes-swerc-2020-2021/README.md

@@ -16,9 +16,7 @@ make?
 ### Input
 
 - **Line 1:** Single integer `N` for the number of ingredients.
-- **`N` next lines:** One for each ingredient. Each of these lines contains two positive integers:
+- **`N` next lines:** One for each ingredient. Each of these lines contains two positive integers: the first one is the required quantity of this ingredient per cake, the second one is the quantity of this ingredient you have in your kitchen.
-  the first one is the required quantity of this ingredient per cake, the second one is the quantity of
-  this ingredient you have in your kitchen.
 
 ### Output
 
@@ -32,7 +30,7 @@ available ingredients.
 
 ## Source
 
-[SWERC 2020–2021 - Problem E: Cake](https://swerc.eu/2020/problems/)
+[SWERC 2020-2021 - Problem E: Cake](https://swerc.eu/2020/problems/)
 
 ## Examples
 

challenges/defibrillators/README.md

@@ -21,7 +21,8 @@ This data is comprised of lines, each of which represents a defibrillator. Each
 - Contact Phone number
 - Longitude (degrees)
 - Latitude (degrees)
-  These fields are separated by a semicolon (`;`).
+
+These fields are separated by a semicolon (`;`).
 
 **Beware:** the decimal numbers use the comma (,) as decimal separator. Remember to turn the comma (,) into dot (.) if necessary in order to use the data in your program.
 

challenges/print-pyramid/README.md

@@ -14,37 +14,3 @@ Display a pyramid of stars (`*`) whose height is given and in the right order (`
 ## Examples
 
 See the `test` folder for examples of input/output.
-
-### Example 1
-
-#### Input
-
-```txt
-normal
-3
-```
-
-#### Output
-
-```txt
-  *
- ***
-*****
-```
-
-### Example 2
-
-#### Input
-
-```txt
-reverse
-3
-```
-
-#### Output
-
-```txt
-*****
- ***
-  *
-```

cli/services/Challenge.ts

@@ -19,7 +19,7 @@ export class Challenge implements ChallengeOptions {
   public name: string
   public path: string
 
-  constructor(options: ChallengeOptions) {
+  public constructor(options: ChallengeOptions) {
     const { name } = options
     this.name = name
     this.path = fileURLToPath(new URL(`./${name}`, Challenge.BASE_URL))

cli/services/GitAffected.ts

@@ -20,7 +20,7 @@ export interface GitAffectedOptions {
 export class GitAffected implements GitAffectedOptions {
   public base?: string
 
-  constructor(options: GitAffectedOptions = {}) {
+  public constructor(options: GitAffectedOptions = {}) {
     this.base = options.base
   }
 

cli/services/Solution.ts

@@ -38,7 +38,7 @@ export class Solution implements SolutionOptions {
   public path: string
   public temporaryFolder: TemporaryFolder
 
-  constructor(options: SolutionOptions) {
+  public constructor(options: SolutionOptions) {
     const { programmingLanguageName, challenge, name } = options
     this.programmingLanguageName = programmingLanguageName
     this.challenge = challenge
@@ -92,7 +92,9 @@ export class Solution implements SolutionOptions {
     }
   }
 
-  static async generate(options: GenerateSolutionOptions): Promise<Solution> {
+  public static async generate(
+    options: GenerateSolutionOptions,
+  ): Promise<Solution> {
     const { name, challengeName, programmingLanguageName, githubUser } = options
     const challenge = new Challenge({ name: challengeName })
     if (!(await isExistingPath(challenge.path))) {
@@ -116,7 +118,7 @@ export class Solution implements SolutionOptions {
     return solution
   }
 
-  static async get(options: GetSolutionOptions): Promise<Solution> {
+  public static async get(options: GetSolutionOptions): Promise<Solution> {
     const { name, challengeName, programmingLanguageName } = options
     const challenge = new Challenge({
       name: challengeName,
@@ -132,7 +134,9 @@ export class Solution implements SolutionOptions {
     return solution
   }
 
-  static async getManyByChallenge(challenge: Challenge): Promise<Solution[]> {
+  public static async getManyByChallenge(
+    challenge: Challenge,
+  ): Promise<Solution[]> {
     const solutionsPath = path.join(challenge.path, "solutions")
     const languagesSolution = (await fs.promises.readdir(solutionsPath)).filter(
       (name) => {
@@ -151,7 +155,7 @@ export class Solution implements SolutionOptions {
     return await Solution.getManyByPaths(paths)
   }
 
-  static async getManyByProgrammingLanguages(
+  public static async getManyByProgrammingLanguages(
     programmingLanguages?: string[],
   ): Promise<Solution[]> {
     const languages =
@@ -185,7 +189,7 @@ export class Solution implements SolutionOptions {
    * @param paths relative to `challenges` (e.g: `challenges/hello-world/solutions/c/function`)
    * @returns
    */
-  static async getManyByPaths(paths: string[]): Promise<Solution[]> {
+  public static async getManyByPaths(paths: string[]): Promise<Solution[]> {
     const solutions: string[] = []
     for (const path of paths) {
       if (await isExistingPath(path)) {

cli/services/SolutionTestsResult.ts

@@ -25,7 +25,7 @@ export class SolutionTestsResult implements SolutionTestsResultOptions {
     "Success:",
   )} Tests passed! 🎉`
 
-  constructor(options: SolutionTestsResultOptions) {
+  public constructor(options: SolutionTestsResultOptions) {
     this.tests = options.tests.sort((a, b) => {
       return a.testNumber - b.testNumber
     })

cli/services/Test.ts

@@ -35,7 +35,7 @@ export class Test implements TestOptions {
   public output: string
   public stdout: string
 
-  constructor(options: TestOptions) {
+  public constructor(options: TestOptions) {
     this.testNumber = options.testNumber
     this.path = options.path
     this.isSuccess = options.isSuccess
@@ -44,7 +44,7 @@ export class Test implements TestOptions {
     this.stdout = options.stdout
   }
 
-  static async runAll(solution: Solution): Promise<SolutionTestsResult> {
+  public static async runAll(solution: Solution): Promise<SolutionTestsResult> {
     const testsPath = path.join(solution.challenge.path, "test")
     const testsFolders = await fs.promises.readdir(testsPath)
     const testsNumbers = testsFolders.map((test) => {
@@ -62,7 +62,7 @@ export class Test implements TestOptions {
     return new SolutionTestsResult({ solution, tests, elapsedTimeMilliseconds })
   }
 
-  static async getInputOutput(testPath: string): Promise<InputOutput> {
+  public static async getInputOutput(testPath: string): Promise<InputOutput> {
     const inputPath = path.join(testPath, "input.txt")
     const outputPath = path.join(testPath, "output.txt")
     const input = await fs.promises.readFile(inputPath, { encoding: "utf-8" })
@@ -72,7 +72,9 @@ export class Test implements TestOptions {
     return { input, output }
   }
 
-  static async runManyWithSolutions(solutions: Solution[]): Promise<number> {
+  public static async runManyWithSolutions(
+    solutions: Solution[],
+  ): Promise<number> {
     const solutionTestsResultsPromises: Array<Promise<SolutionTestsResult>> = []
     let isSolutionSuccess = true
     for (const solution of solutions) {
@@ -98,7 +100,7 @@ export class Test implements TestOptions {
     return 1
   }
 
-  static async run(options: TestRunOptions): Promise<Test> {
+  public static async run(options: TestRunOptions): Promise<Test> {
     const { input, output } = await Test.getInputOutput(options.path)
     try {
       const { stdout } = await docker.run(

package.json

@@ -27,42 +27,41 @@
     "test": "cross-env NODE_ENV=test node --enable-source-maps --test \"build/**/*.test.js\""
   },
   "dependencies": {
-    "chalk": "5.3.0",
+    "chalk": "5.4.1",
     "clipanion": "3.2.1",
     "date-and-time": "3.6.0",
-    "execa": "9.5.1",
+    "execa": "9.5.3",
-    "log-symbols": "6.0.0",
+    "log-symbols": "7.0.0",
-    "ora": "8.1.1",
+    "ora": "8.2.0",
-    "replace-in-file": "8.2.0",
+    "replace-in-file": "8.3.0",
-    "table": "6.8.2",
+    "table": "6.9.0",
     "typanion": "3.14.0",
     "validate-npm-package-name": "6.0.0"
   },
   "devDependencies": {
-    "@swc/cli": "0.5.0",
+    "@swc/cli": "0.7.7",
-    "@swc/core": "1.9.2",
+    "@swc/core": "1.11.24",
-    "@tsconfig/strictest": "2.0.5",
     "@types/mock-fs": "4.13.4",
-    "@types/ms": "0.7.34",
+    "@types/ms": "2.1.0",
-    "@types/node": "22.9.0",
+    "@types/node": "22.15.17",
-    "@types/sinon": "17.0.3",
+    "@types/sinon": "17.0.4",
     "@types/validate-npm-package-name": "4.0.2",
     "cross-env": "7.0.3",
-    "editorconfig-checker": "6.0.0",
+    "editorconfig-checker": "6.0.1",
-    "eslint": "9.15.0",
+    "eslint": "9.26.0",
-    "eslint-config-conventions": "17.0.1",
+    "eslint-config-conventions": "19.2.0",
-    "eslint-plugin-import-x": "4.4.2",
+    "eslint-plugin-import-x": "4.11.1",
-    "eslint-plugin-promise": "7.1.0",
+    "eslint-plugin-promise": "7.2.1",
-    "eslint-plugin-unicorn": "56.0.0",
+    "eslint-plugin-unicorn": "59.0.1",
     "get-stream": "9.0.1",
-    "globals": "15.12.0",
+    "globals": "16.1.0",
-    "markdownlint-cli2": "0.15.0",
+    "markdownlint-cli2": "0.18.0",
-    "markdownlint-rule-relative-links": "3.0.0",
+    "markdownlint-rule-relative-links": "4.1.0",
-    "mock-fs": "5.4.1",
+    "mock-fs": "5.5.0",
     "ms": "2.1.3",
-    "prettier": "3.3.3",
+    "prettier": "3.5.3",
-    "sinon": "19.0.2",
+    "sinon": "20.0.0",
-    "typescript": "5.6.3",
+    "typescript": "5.8.3",
-    "typescript-eslint": "8.14.0"
+    "typescript-eslint": "8.32.1"
   }
 }

templates/docker/dart/Dockerfile

@@ -1,4 +1,4 @@
-FROM dart:3.5.4 AS builder
+FROM dart:3.7.3 AS builder
 WORKDIR /usr/src/application
 COPY ./ ./
 RUN dart compile exe solution.dart -o solution

templates/docker/python/Dockerfile

@@ -1,4 +1,4 @@
-FROM pypy:3.10-bookworm
+FROM pypy:3.11-bookworm
 WORKDIR /usr/src/application
 COPY ./ ./
 CMD ["python", "solution.py"]

templates/docker/rust/Dockerfile

@@ -1,4 +1,4 @@
-FROM rust:1.82.0 AS builder
+FROM rust:1.86.0 AS builder
 WORKDIR /usr/src/rust_application
 
 # Cache dependencies

templates/docker/typescript/Dockerfile

@@ -1,9 +1,9 @@
-FROM node:22.11.0 AS builder-dependencies
+FROM node:22.15.0 AS builder-dependencies
 WORKDIR /usr/src/application
 COPY ./package*.json ./
 RUN npm install
 
-FROM node:22.11.0 AS builder
+FROM node:22.15.0 AS builder
 WORKDIR /usr/src/application
 COPY --from=builder-dependencies /usr/src/application/node_modules ./node_modules
 COPY ./ ./

tsconfig.json

@@ -1,15 +1,37 @@
 {
-  "extends": "@tsconfig/strictest/tsconfig.json",
   "compilerOptions": {
-    "target": "ESNext",
-    "module": "NodeNext",
     "lib": ["ESNext"],
-    "moduleResolution": "NodeNext",
     "outDir": "./build",
     "rootDir": "./cli",
-    "noEmit": true,
     "checkJs": false,
-    "exactOptionalPropertyTypes": false
+    "exactOptionalPropertyTypes": false,
+
+    "strict": true,
+    "allowUnusedLabels": false,
+    "allowUnreachableCode": false,
+    "noFallthroughCasesInSwitch": true,
+    "noImplicitOverride": true,
+    "noImplicitReturns": true,
+    "noImplicitThis": true,
+    "noImplicitAny": true,
+    "noUncheckedIndexedAccess": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "erasableSyntaxOnly": true,
+
+    "verbatimModuleSyntax": true,
+    "isolatedModules": true,
+    "esModuleInterop": true,
+    "allowImportingTsExtensions": false,
+    "skipLibCheck": true,
+    "jsx": "preserve",
+    "incremental": true,
+    "noEmit": true,
+
+    "target": "ESNext",
+    "module": "ESNext",
+    "moduleResolution": "Bundler",
+    "resolveJsonModule": true
   },
   "exclude": ["node_modules", "challenges", "templates", "temp", "tmp"]
 }