https://github.com/tgkei/Algorithm_study/blob/0c5a68d56e0b2f3a4e89d83f5708f0b62c86dfd0/by_python/kakao_enterprise/4.py#L43-L44 ```py print( -1 if res === inf else res) ``` 내 풀리퀘를 받아줘