Second attempt.

.github/workflows/solve.yaml

@@ -9,7 +9,18 @@ jobs:
   example-action:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
+      - uses: actions/setup-java@v4
+        with:
+          distribution: 'corretto' # See 'Supported distributions' for available options
+          java-version: '21'
+      - name: Install Kotlin Compiler
+        run: |
+          sudo apt-get install -y curl
+          curl -s https://get.sdkman.io | bash
+          source "$HOME/.sdkman/bin/sdkman-init.sh"
+          sdk install kotlin
+          kotlin -version
       - name: Day 1
         run: kotlin puzzle1.kts
       - name: Day 2