feat(workflow): add run-all-problems.yml

.github/workflows/run-all-problems.yml

@@ -0,0 +1,44 @@
+name: Build and Run All Problems
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+  workflow_dispatch:
+
+jobs:
+  build-and-run:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v3
+
+    - name: Install dependencies
+      run: |
+        sudo apt-get update
+        sudo apt-get install -y cmake build-essential
+
+    - name: Configure project
+      run: cmake -S . -B build
+
+    - name: Build all
+      run: cmake --build build -- -j$(nproc)
+
+    - name: Run all executables (stop on failure)
+      run: |
+        set -e
+        echo "Find and run all problems..."
+
+        find build -type f -perm /111 | while read exe; do
+          if [[ "$(basename "$exe")" =~ ^[0-9]+- ]]; then
+            echo "▶️ Run: $exe"
+            if ! "$exe"; then
+              echo "❌ Failed: $exe"
+              exit 1
+            fi
+          fi
+        done