こんにちは, Codeforces!

We're excited to invite you to Codeforces Round 1225 (Div. 4) on Monday, June 7, 2027 at 14:35. You will be given $$$2.25$$$ hours and $$$6\sim7$$$ problems. All of the problems are interactive, so read the guide to interactive problems.

The problems will be authored by yql0991666 and me, __yql0991888__.

The round will be rated for participants with a rating below 1400. It will be held on extended ICPC rules. The penalty for each incorrect submission until the submission with a full solution is 10 minutes. After the end of the contest, you will have 12 hours to hack any solution you want. You will have access to copy any solution and test it locally.

We would like to thank:

• CarViz for great coordination.
• XVIII for red testing.
• MIDORIYA_ for orange testing.
• zhoujiarun0216 for cyan testing.
• gpyqwq, sunsetinParis and ZengDingjun_EggArmy for gray testing.
• You for participating.

Good luck & have fun!