DescriptionOur chemical biologists have invented a new very useful form of life called stripies (in fact, they were first called in Russian - polosatiki, but the scientists had to invent an English nam

Problem Description在山上一共有N个站点需要检查，检查员从山顶出发去各个站点进行检查，各个站点间有且仅有一条通路，检查员下山前往站点时比较轻松，而上山时却需要额外的时间，问最后检查员检查完所有站点时所需要的额外时间最少是多少。Input包含多组数据 每组数据输入第一行为一个整数N 表示站点个数（1<=N<=100000）,接下去N-1 行 每行3个整数 x，y，z(1<=z<=10

Om Nom is the main character of a game “Cut the Rope”. He is a bright little monster who likes visiting friends living at the other side of the park. However the dark old parks can scare even somebody

Leonid wants to become a glass carver (the person who creates beautiful artworks by cutting the glass). He already has a rectangular w mm  ×  h mm sheet of glass, a diamond glass cutter and lots of enthusiasm.

Problem DescriptionLimak is a grizzly bear who desires power and adoration. He wants to win in upcoming elections and rule over the Bearland.There are n candidates, including Limak. We know how many ci

In this task you need to process a set of stock exchange orders and use them to create order book.An order is an instruction of some participant to buy or sell stocks on stock exchange. T