摘要：
You are given a line of nn colored squares in a row, numbered from 11 to nn from left to right. The ii-th square initially has the color cici. Let's s 阅读全文
摘要：
题意翻译 给定一个 2×n 的矩阵，现从中选择若干数，且任意两个数不上下或左右相邻，求这些数的和最大是多少？ 题目描述 Finally, a basketball court has been opened in SIS, so Demid has decided to hold a basketb 阅读全文