Hello CodeForces Community,

I would like to invite you to participate in 101 Hack 41 will be held on Tuesday, 20 of September. The problems were set by me (Yury Bandarchuk) and josdas (Stanislav Naumov), tested by wanbo.

101 Hack is back with its 41st edition! Passionate programmers will enjoy solving algorithmic challenges. It's all about speed, accuracy and efficiency: 5 challenges in 120 minutes. Every second counts!

Top 10 winners on the leaderboard will receive a HackerRank T-Shirt.

Hope, you will participate and enjoy the problems.

Good luck && have fun!