# bài toán ChiTan ![](https://i.imgur.com/aXsmyyk.png) ![](https://i.imgur.com/ib8V5ZK.png) ![](https://i.imgur.com/wehmHAS.png) ![](https://i.imgur.com/36NGrzB.png) ![](https://i.imgur.com/LIKRUkx.png) ![](https://i.imgur.com/4iQ8g3A.png)