摘要：
C. Drazil and Park 题目连接： http://codeforces.com/contest/516/problem/C Description Drazil is a monkey. He lives in a circular park. There are n trees ar 阅读全文
摘要：
B. Drazil and Tiles 题目连接： http://codeforces.com/contest/516/problem/B Description Drazil created a following problem about putting 1 × 2 tiles into an 阅读全文
摘要：
A. Drazil and Factorial 题目连接： http://codeforces.com/contest/516/problem/A Description Drazil is playing a math game with Varda. Let's define for posit 阅读全文