行远山

摘要： 题目描述 There are infinitely many cards, numbered 1, 2, 3, … Initially, Cards x1, x2, …, xN are face up, and the others are face down.Snuke can perform t 阅读全文

摘要： 链接：https://www.nowcoder.com/acm/contest/139/J来源：牛客网 Given a sequence of integers a1, a2, ..., an and q pairs of integers (l1, r1), (l2, r2), ..., (lq, 阅读全文

摘要： 题目描述 Farmer John's N cows (1≤N≤105), numbered 1…N as always, happen to have too much time on their hooves. As a result, they have worked out a complex 阅读全文

摘要： Let's call an undirected graph G=(V,E)G=(V,E) relatively prime if and only if for each edge (v,u)∈E(v,u)∈E GCD(v,u)=1GCD(v,u)=1 (the greatest common d 阅读全文

摘要： 问题 E: 费解的开关 题目描述 你玩过“拉灯”游戏吗？25盏灯排成一个5x5的方形。每一个灯都有一个开关，游戏者可以改变它的状态。每一步，游戏者可以改变某一个灯的状态。游戏者改变一个灯的状态会产生连锁反应：和这个灯上下左右相邻的灯也要相应地改变其状态。我们用数字“1”表示一盏开着的灯，用数字“0” 阅读全文

摘要： 题目描述 给定一张 n(n≤20) 个点的带权无向图，点从 0~n-1 标号，求起点 0 到终点 n-1 的最短Hamilton路径。 Hamilton路径的定义是从 0 到 n-1 不重不漏地经过每个点恰好一次。 输入 第一行一个整数n。接下来n行每行n个整数，其中第i行第j个整数表示点i到j的距 阅读全文

摘要： time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output time limit per test 2 seconds time limit 阅读全文

摘要： Ezio learned a lot from his uncle Mario in Villa Auditore. He also made some contribution to Villa Auditore. One of the contribution is dividing it in 阅读全文

摘要： Some company is going to hold a fair in Byteland. There are nn towns in Byteland and mm two-way roads between towns. Of course, you can reach any town 阅读全文

摘要： 题目描述 JSZKC is going to spend his vacation! His vacation has N days. Each day, he can choose a T-shirt to wear. Obviously, he doesn’t want to wear a si 阅读全文