feat(cli): 支持多重目录结构与特殊解法运行，新增解法列表选项

main.py

@@ -62,16 +62,61 @@ def list_problems(every: bool = False):
 
 
 @app.command("solution", help="Run a solution for a given problem.")
-def run_solution(num: int) -> None:
-    folders = list(Path("solutions").iterdir())
-    folders = [
-        folder
-        for folder in folders
-        if folder.is_dir() and folder.name.startswith(f"{num:04d}")
-    ]
-    runpy.run_path(
-        (folders[0] / f"euler_{num}.py").resolve().as_posix(), run_name="__main__"
-    )
+def run_solution(
+    num: int,
+    special: None | str = None,
+    list_solutions: bool = False,
+) -> None:
+    # Find target folders that match the problem number
+    target_folders = []
+    for folder in Path("solutions").iterdir():
+        if not folder.is_dir():
+            continue
+        # Check for exact match (e.g., "0001")
+        if folder.name.startswith(f"{num:04d}"):
+            target_folders.append(folder)
+            break
+        # Check for range folders (e.g., "0001_0050")
+        if "_" in folder.name:
+            try:
+                start_str, end_str = folder.name.split("_")
+                start_num = int(start_str)
+                end_num = int(end_str)
+                if start_num <= num <= end_num:
+                    for subfolder in folder.iterdir():
+                        if subfolder.is_dir() and subfolder.name.startswith(
+                            f"{num:04d}"
+                        ):
+                            target_folders.append(subfolder)
+                            break
+            except (ValueError, IndexError):
+                continue
+
+    if not target_folders:
+        typer.echo(f"No folder found for problem {num}")
+        return
+
+    target_folder = target_folders[0]
+
+    if list_solutions:
+        # List all Python files in the target folder
+        for file in target_folder.iterdir():
+            if file.is_file() and file.suffix == ".py":
+                typer.echo(f"{file.name}")
+        return
+
+    # Determine the filename to run
+    filename = f"euler_{num}.py"
+    if special:
+        filename = f"euler_{num}_{special}.py"
+
+    file_path = target_folder / filename
+    if not file_path.exists():
+        typer.echo(f"Solution file not found: {file_path}")
+        return
+
+    # Run the solution
+    runpy.run_path(file_path.resolve().as_posix(), run_name="__main__")
 
 
 @app.command("version", help="Display the version of the projecteuler CLI.")