摘要:
Description Petya recieved a gift of a string s with length up to 105 characters for his birthday. He took two more empty strings t and u and decided 阅读全文
摘要:
Description You are given sequence a1, a2, ..., an of integer numbers of length n. Your task is to find such subsequence that its sum is odd and maxim 阅读全文
摘要:
Description Given a positive integer n, find k integers (not necessary distinct) such that all these integers are strictly greater than 1, and their p 阅读全文