Problem # 1068 :
http://acm.timus.ru/problem.aspx?space=1&num=1068

Accepted Submissions with low execution & less memory consumption
http://acm.timus.ru/rating.aspx?space=1&num=1068
http://acm.timus.ru/rating.aspx?space=1&num=1068&pos=23           (0.001       75 KB)

MY SUBMISSION        :(
http://acm.timus.ru/status.aspx?space=1&num=1068&author=49366      (0.015          284 KB)

Will you please help me out?

use O(1) >>formula.
and it is chance get run with 0.001