摘要：Description You are given an integer number nn. The following algorithm is applied to it: if n=0, then end algorithm; find the smallest prime divisor  阅读全文

摘要：Description You are given a positive integer nn. Let S(x) be sum of digits in base 10 representation of xx, for example, S(123)=1+2+3=6, S(0)=0. Your 阅读全文

摘要：Vasya came up with a password to register for EatForces — a string ss. The password in EatForces should be a string, consisting of lowercase and upper 阅读全文

摘要：Description The most important part of a GSM network is so called Base Transceiver Station (BTS). These transceivers form the areas called cells (this 阅读全文

摘要：Since Sonya is interested in robotics too, she decided to construct robots that will read and recognize numbers. Sonya has drawn nn numbers in a row,  阅读全文

摘要：Description Natasha is planning an expedition to Mars for nn people. One of the important tasks is to provide food for each participant. The warehouse 阅读全文