Good day for all!
I invite you to participiate in the round 194. I'm author of it. It is my fourth round, but three previous ones were a long time ago: Codeforces Beta Round #79 (Div. 1 Only), Codeforces Beta Round #94 (Div. 1 Only), Codeforces Round #110 (Div. 1) (I apologize to the div-2 participants that I have mention only div-1 round, but even one link looks bulky).
This time you will help to boy Gerald cope with his problems as in the Codeforces Beta Round #79 (Div. 1 Only). This time his problems are so serious that he became coordinator of contests on the Codeforces, to be able to throw his problems to you.
I want to thank Gerald for he is great as coordinator. When you are work with him you are fill the everythink is under control. Moreover I want to thank Maria Belova for translation problems statements to the English.
This round will be held in unusual time — 12:30 Moscow Time.
Score distribution is standart: 500 — 1000 — 1500 — 2000 — 2500.
Thanks everyone for participation, welcom to editoral.
Separate note two Ukrainian participiants, who only solve all five problems!
Following numerous requests to authors of rounds, I will talk something about me. My name is Valera Samoylov and I'm 24. I have graduated from SPb SU two years ago. Now I working on chemical layout of graphs and bringing up my little daughter together with my wife. Moreover last 8 years I'm teach schoolchilds math (and, last year, programming) in mathematical school in Saint-Petersburg. It all explains why I have not made rounds last time, although I have abound invented problems. Nonetheless I have found some time to make the round while my wife and daughter are on the vacation and schoolchilds on the vacation too. I hope you are will find that I not waste this time.