NGM - A Game with Numbers

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Nikifor and Trofim play the following game: they write some positive integer smaller than 2,000,000,000 and take turns one after another. Nikifor is the first to make a move. The turn is made by the following rule: from the written integer any non-zero digit is subtracted, and the new integer replaces the old one on the desk. For example for integer 40534, the next move can be: 40530, 40531 or 40529. The winner is the player who writes zero on the desk.

Write a program to decide who will win if both players do their best.


The input contains the positive integer from which the game is started.


In the first line you must write 1 if Nikifor wins and 2 otherwise. If Nikifor wins then in the second line you must output the move in the first turn which guarantees victory for him. If there are many such moves then output any of them.




Author: Filimonenkov D.O.

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scorpion_ajay: 2017-01-14 09:39:48

try hubullu before this, it will be double fun :)

pradeepgangwar: 2017-01-09 10:27:56

Last edit: 2017-01-09 10:31:34
anikdeyshaon: 2016-12-31 13:33:42

Last edit: 2016-12-31 13:34:35
aditya9125: 2016-12-28 07:38:20

Sometimes just using pen paper solves the problem..try it.

narutohokage_1: 2016-10-24 19:37:00

KNOW THAT YOU ARE NO LESS THAN ANYONE ELSE. Do not look for hint , Just be patient and hardworking. I saw this problem one month ago , i gave 5 minutes to it , i was not able to think out , i left the problem. Now today i tried and succeded , if you are unable to think clear just take a break , relax. You will surely solve it. Learnt Something Today, Do not look for hint , as it will not help you learn anything ... and that feeling of solving will not be there ...

narutohokage_1: 2016-10-24 19:35:34

Do not read the comment , every problem before knowing the logic or having intuition behind it look difficult after that it looks easy. Just know this thing and

angel_of_death: 2016-10-20 15:49:06

Awesome problem. Simple but clever logic.

sayedathar11: 2016-08-14 09:25:59

Too easy to miss out Ac in One go my 30 th :)

cnexans: 2016-07-27 18:06:18

I got TLE because the algorithm was playing the game... this can be done in constant time... AC.

pt97: 2016-07-19 21:12:10

In a move a person can subtract 1-9 no from the it

Added by:Roman Sol
Time limit:0.620s
Source limit:50000B
Memory limit:1536MB
Cluster: Cube (Intel G860)
Languages:All except: ERL JS NODEJS PERL 6
Resource:ZCon 2007