Contest Link If you haven't read the problems or tried to solve it yourself, don't read this. A - Clock Difficulty: d2b Hint The hour hand of the clock moves 0.5 degree per minute, the minute hand of the clock moves 6 degree per minute. Then it tur……

思考题 for 2020 DuiLian 二十年飞花不尽 一几度落月无穷 九州同乐 Of twenty years, the flower never withers In one eternity, the moon forever remains Enjoy it together It's 2020 soon. It's time for the biggest holiday - The Yuandan and the Chinese Ne……

思考题 about cheating Lottery Cheating Let's have some lottery! In this lottery system, a number string S and an array of integers A is predetermined. It is known that |A|=|S| and let's define A_0=0. Each user chooses a number string T(|T|=|S|). Th……

思考题 Times A shadow pokemon! Recently the famous game Pokemon SwordString was released. XGN, one of the biggest fan of Pokemon, decided to have a try. In each battle, your Pokemon can be seen as a string A and the enemy can be seen as a string B.……

思考题 in one sentence Yet Another Easy Problem Find any positive integer pair a,b so that (a+b)+(a+b)\mod k=n where k,n are given or -1 -1 if not found. Examples Input K=100 N=268 Output 200 34 Explain 200+34+(200+34)mod 100=234+34=268 Input K=100……

Solved! Difficulty: Div2E-Div2F If you prefer easier problem, please visit here 思考题 for dw Childish War (Hard) Miss. Broken Tail(Wei Duan) is the Math teacher of NFLS Class 8 Junior 3.She is a kind teacher. Miss. East(Fang Dong) is the Mat……

Solved! Difficulty: Div2D-Div2E If you prefer harder problem, please visit here 思考题 for dw Childish War (Easy) Miss. Broken Tail(Wei Duan) is the Math teacher of NFLS Class 8 Junior 3.She is a kind teacher. Miss. East(Fang Dong) is the Mat……

思考题 with NFLS teachers Husky Miss Husky (Shiqi Hao) is the Art teacher of NFLS Class 8 Junior 3. She is a kind teacher. But in fact, she is a spy working for NFLS. One day, she received the task to observe all the schools in Nanjing. There are N……

Sadly, HHS has no money to afford servers and domains 🙁 After 6 months, OJ will be shut down and the blog will be transferred to Github. The detailed link will be announced soon. Our project list and Discord servers will be still open. The datailed……

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