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feat(workflow): add run-all-problems.yml #1

	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