摘要：
https://www.jisuanke.com/contest/1409/challenges 题目描述 Alice and Bob are playing a simple game. They line up a row of n identical coins, all with the h 阅读全文
摘要：
https://www.jisuanke.com/contest/1409/challenges 题目描述 Consider a triangle of integers, denoted by T. The value at (r, c) is denoted by Tr,c , where 1 阅读全文