Hello!

I invite everybody to the August Lunch Time that will be held at CodeChef on this Sunday. You can check the starting time in your country here. This time, I am the writer of the contest.

You can find the problems of the two previous Lunch Times at codechef.com/LTIME01 and codechef.com/LTIME02.

In my point of view, this time the problems are significantly easier than the last two times, but nevertheless, I do hope that everybody will find something appropriate for him/her.

In case you don't know the rules here's the brief description: there are four problems with new-IOI-style grading (subtasks), so not only full solutions are considered. In case two contestants have got equal scores, the one whose last submission, which has improved his score was made first will be ranked higher. The scoreboard is visible during the whole competition. And there are separate rankings for the secondary school students.

Good luck and have fun ^_^

P.S. Feel free to discuss the problems here after the end of the contest.

UPD: The contest has started. You can find the problems here.

UPD: The contest has ended. Congrats to sy2006 — the only person who got 400 ^_^