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You are given two stringsssandtt, both consisting of exactlykklowercase Latin letters,ssis lexicographically less thantt.Let's consider list of all strings consisting of exactlykklowercase...

Recently a Golden Circle of Beetlovers was found in Byteland. It is a circle route going throughn⋅kcities. The cities are numerated from11ton⋅kn⋅k, the distance between the neighboring cities is e...

A superhero fights with a monster. The battle consists of rounds, each of which lasts exactlynnminutes. After a round ends, the next round starts immediately. This is repeated over and over again....

Vanya has a scales for weighing loads and weights of massesw0, w1, w2, ..., w100grams wherewis some integer not less than2(exactly one weight of each nominal value). Vanya wonders whether he can ...

题目链接:http://codeforces.com/problemset/problem/1172/BNauuo is a girl who loves drawing circles.One day she has drawn a circle and wanted to draw a tree on it.The tree is a connected undirected gr...