摘要：
You are given undirected weighted graph. Find the length of the shortest cycle which starts from the vertex 1 and passes throught all the edges at lea 阅读全文
摘要：
Given a positive odd integer K and two positive integers low and high, determine how many integers between low and high contain exactly K divisors. In 阅读全文
摘要：
This is yet another problem on regular bracket sequences. A bracket sequence is called regular, if by inserting "+" and "1" into it we get a correct m 阅读全文
摘要：
Consider two integer sequences f(n) = n! and g(n) = an, where n is a positive integer. For any integer a > 1 the second sequence is greater than the f 阅读全文