樱花落舞

摘要： Description Memory is performing a walk on the two-dimensional plane, starting at the origin. He is given a string s with his directions for motion: A 阅读全文

摘要： Description There are n integers b1, b2, ..., bn written in a row. For all i from 1 to n, values ai are defined by the crows performing the following 阅读全文

摘要： In this problem you are to calculate the sum of all integers from 1 to n, but you should take all powers of two with minus in the sum. For example, fo 阅读全文

摘要： Description Alex doesn't like boredom. That's why whenever he gets bored, he comes up with games. One long winter evening he came up with a game and d 阅读全文

摘要： Description Fedya studies in a gymnasium. Fedya's maths hometask is to calculate the following expression: (1n + 2n + 3n + 4n) mod 5 for given value o 阅读全文

摘要： Description One day Dima and Alex had an argument about the price and quality of laptops. Dima thinks that the more expensive a laptop is, the better 阅读全文

摘要： Description Find an n × n matrix with different numbers from 1 to n2, so the sum in each row, column and both main diagonals are odd. Input The only l 阅读全文

摘要： Description You are given n points on a line with their coordinates xi. Find the point x so the sum of distances to the given points is minimal. Descr 阅读全文

摘要： Description he only king stands on the standard chess board. You are given his position in format "cd", where c is the column from 'a' to 'h' and d is 阅读全文

摘要： Description Katya studies in a fifth grade. Recently her class studied right triangles and the Pythagorean theorem. It appeared, that there are triple 阅读全文