import json
import os

grade_file = "final_grade.json"
if os.path.exists(grade_file):
    with open(grade_file) as f:
        data = json.load(f)
    print(json.dumps({"grade": data.get("total", 0), "status": "graded"}))
else:
    print(json.dumps({"grade": 0, "status": "error"}))