摘要：
Array of integers is unimodal, if: it is strictly increasing in the beginning; after that it is constant; after that it is strictly decreasing. The fi 阅读全文
该文被密码保护。 阅读全文
摘要：
Ivan had string s consisting of small English letters. However, his friend Julia decided to make fun of him and hid the string s. Ivan preferred makin 阅读全文
摘要：
Polycarp has a checkered sheet of paper of size n × m. Polycarp painted some of cells with black, the others remained white. Inspired by Malevich's "B 阅读全文
摘要：
In a small restaurant there are a tables for one person and b tables for two persons. It it known that n groups of people come today, each consisting 阅读全文
摘要：
Erelong Leha was bored by calculating of the greatest common divisor of two factorials. Therefore he decided to solve some crosswords. It's well known 阅读全文
摘要：
Holidays have finished. Thanks to the help of the hacker Leha, Noora managed to enter the university of her dreams which is located in a town Pavlopol 阅读全文
摘要：
On his trip to Luxor and Aswan, Sagheer went to a Nubian market to buy some souvenirs for his friends and relatives. The market has some strange rules 阅读全文
该文被密码保护。 阅读全文
摘要：
Sagheer is walking in the street when he comes to an intersection of two roads. Each road can be represented as two parts where each part has 3 lanes 阅读全文