Hello codeforces! Goodbye Renyin!↵
↵
>In a flash, 2022 is over. The Rabbit year is coming, now the world is full of <font color="#FFC0CB">PinkRabbit</font>. But the group of PinkRabbits was infiltrated by a RinkRabbit.↵
↵
>The king of PinkRabbit has noticed. He decided to hold a "Rabbing test" to identify the RinkRabbit. You, the Volt, an assistant of the king, need to help the king to complete the test.↵
↵
>↵
↵
>The picture shows a RinkRabbit walking toward.↵
↵
We will hold [Goodbye Renyin](https://uoj.ac/contest/80), which will take place on [Friday, January 20, 2023 at 13:00<sup title="timezone offset" style="font-size:8px;">UTC+8</sup>](https://www.timeanddate.com/worldclock/fixedtime.html?msg=The+contest+will+hold+at&iso=20230120T13&p1=33&ah=5)↵
↵
The duration time is 5 hours, and there will be 5 problems.↵
↵
The rule uses pretests, and only the **last** submit will be counted in.↵
↵
There are simple and interesting problems, welcome to play!↵
↵
Writers: [user:changruinian2020,2023-01-17] [user:ix35,2023-01-17] [user:flowerletter,2023-01-17] [user:Melania,2023-01-17] [user:qingyu,2023-01-17]↵
↵
Some Explain: The Renyin is the 39th stem and branch (An ancient Chinese chronology) and after the day named Chuxi is the Chinese new year. And unfortunately, our languages support only simplified Chinese, we are very sorry for this.
↵
>In a flash, 2022 is over. The Rabbit year is coming, now the world is full of <font color="#FFC0CB">PinkRabbit</font>. But the group of PinkRabbits was infiltrated by a RinkRabbit.↵
↵
>The king of PinkRabbit has noticed. He decided to hold a "Rabbing test" to identify the RinkRabbit. You, the Volt, an assistant of the king, need to help the king to complete the test.↵
↵
>↵
↵
>The picture shows a RinkRabbit walking toward.↵
↵
We will hold [Goodbye Renyin](https://uoj.ac/contest/80), which will take place on [Friday, January 20, 2023 at 13:00<sup title="timezone offset" style="font-size:8px;">UTC+8</sup>](https://www.timeanddate.com/worldclock/fixedtime.html?msg=The+contest+will+hold+at&iso=20230120T13&p1=33&ah=5)↵
↵
The duration time is 5 hours, and there will be 5 problems.↵
↵
The rule uses pretests, and only the **last** submit will be counted in.↵
↵
There are simple and interesting problems, welcome to play!↵
↵
Writers: [user:changruinian2020,2023-01-17] [user:ix35,2023-01-17] [user:flowerletter,2023-01-17] [user:Melania,2023-01-17] [user:qingyu,2023-01-17]↵
↵
Some Explain: The Renyin is the 39th stem and branch (An ancient Chinese chronology) and after the day named Chuxi is the Chinese new year. And unfortunately, our languages support only simplified Chinese, we are very sorry for this.
