# Problems

![](https://cdn.jsdelivr.net/gh/CookieLau/imghost/img/20200906232819.png)

![](https://cdn.jsdelivr.net/gh/CookieLau/imghost/img/20200906232843.png)

![](https://cdn.jsdelivr.net/gh/CookieLau/imghost/img/20200906232852.png)

![](https://cdn.jsdelivr.net/gh/CookieLau/imghost/img/20200906232904.png)

![](https://cdn.jsdelivr.net/gh/CookieLau/imghost/img/20200906232915.png)