摘要：
链接： https://vjudge.net/problem/LightOJ 1095 题意： Consider this sequence {1, 2, 3 ... N}, as an initial sequence of first N natural numbers. You can rea 阅读全文
摘要：
链接： https://vjudge.net/problem/LightOJ 1067 题意： Given n different objects, you want to take k of them. How many ways to can do it? For example, say th 阅读全文
摘要：
链接： https://vjudge.net/problem/LightOJ 1058 题意： There are n distinct points in the plane, given by their integer coordinates. Find the number of paral 阅读全文
摘要：
链接： https://vjudge.net/problem/LightOJ 1005 题意： A rook is a piece used in the game of chess which is played on a board of square grids. A rook can onl 阅读全文