题目链接：http://codeforces.com/contest/975/problem/A题目：In Aramic language words can only represent objects.Words in Aramic have special properties:A word is a root if it does not contain the same lette...
题目链接：http://exam.upc.edu.cn/problem.php?id=5252题目：题目描述Given a triangle ABC with incenter (center of its inscribed circle), I, and circumscribed circle O, let M, N and P be the second points of inte...
题目链接：http://exam.upc.edu.cn/problem.php?id=5247题目：题目描述At some point or another, most computer science students have written a standard Sudoku solving program. This is yet another “put numbers in a...
题目链接：http://codeforces.com/contest/976/problem/E题目：Recently Max has got himself into popular CCG "BrainStone". As "BrainStone" is a pretty intellectual game, Max has to solve numerous hard problems...
题目链接：http://codeforces.com/contest/976/problem/C题目：You are given a sequence a1, a2, ..., an of one-dimensional segments numbered 1 through n. Your task is to find two distinct indices i and j such ...