摘要：BitsLet's denote as the number of bits set ('1' bits) in the binary representation of the non-negative integer x.You are given multiple queries consis... 阅读全文

摘要：Valuable ResourcesMany computer strategy games require building cities, recruiting army, conquering tribes, collecting resources. Sometimes it leads t... 阅读全文

摘要：FactoryOne industrial factory is reforming working plan. The director suggested to set a mythical detail production norm. If at the beginning of the d... 阅读全文

摘要：Restoring IPv6DescriptionAn IPv6-address is a 128-bit number. For convenience, this number is recorded in blocks of 16 bits in hexadecimal record, the... 阅读全文

摘要：Pocket BookDescriptionOne day little Vasya found mom's pocket book. The book had n names of her friends and unusually enough, each name was exactly m ... 阅读全文

摘要：Double HappinessOn the math lesson a teacher asked each pupil to come up with his own lucky numbers. As a fan of number theory Peter chose prime numbe... 阅读全文