1607: [Usaco2008 Dec]Patting Heads 轻拍牛头 Time Limit: 3 Sec Memory Limit: 64 MB Submit: 1383 Solved: 721 [Submit][Status][Discuss] Description 今天是贝茜的生日,为了庆祝自己的生日,贝茜邀你来玩一个游戏． 贝茜让N(1≤N≤100000)头奶牛坐成一个圈．除了1号与N号奶牛外,i号奶牛与i-l号和i+l号奶牛相邻．N号奶牛与1号奶牛相邻．农夫约翰用很多纸条装满…

1607: [Usaco2008 Dec]Patting Heads 轻拍牛头 Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://www.lydsy.com/JudgeOnline/problem.php?id=1607 Description   今天是贝茜的生日,为了庆祝自己的生日,贝茜邀你来玩一个游戏．     贝茜让N(1≤N≤100000)头奶牛坐成一个圈．除了1号与N号奶牛外,i号奶牛与i-l号和i+l号奶牛相邻．N号奶牛与1号奶…

1607: [Usaco2008 Dec]Patting Heads 轻拍牛头 Description   今天是贝茜的生日,为了庆祝自己的生日,贝茜邀你来玩一个游戏．     贝茜让N(1≤N≤100000)头奶牛坐成一个圈．除了1号与N号奶牛外,i号奶牛与i-l号和i+l号奶牛相邻．N号奶牛与1号奶牛相邻．农夫约翰用很多纸条装满了一个桶,每一张包含了一个独一无二的1到1,000,000的数字．     接着每一头奶牛i从柄中取出一张纸条Ai．每头奶牛轮流走上一圈,同时拍打所有编号能整除在纸条…

P2926 [USACO08DEC]拍头Patting Heads 把求约数转化为求倍数. 累计每个数出现的个数,然后枚举倍数累加答案. #include<iostream> #include<cstdio> #include<cstring> #include<cctype> #define re register using namespace std; void read(int &x){ ; while(!isdigit(c)) c=getc…

一.桶排思想 1.通过构建n个空桶再将待排各个元素分配到每个桶.而此时有可能每个桶的元素数量不一样,可能会出现这样的情况:有的桶没有放任何元素,有的桶只有一个元素,有的桶不止一个元素可能会是2+: 2.按照下标对内容非0的桶按个数输出下标: 二.[USACO08DEC]Patting Heads题解 Description -It's Bessie's birthday and time for party games! Bessie has instructed the N (1 <= N <…

Patting Heads 轻拍牛头 bzoj-1607 Usaco-2008 Dec 题目大意:题目链接. 注释:略. 想法:我们发现,位置是没有关系的. 故,我们考虑将权值一样的牛放在一起考虑,cnt[i]表示高度为i的牛的个数. 之后考虑每个权值的牛造成的贡献即可,就是向后枚举. 时间复杂度是调和数列,$O(nlogn)$. 最后,附上丑陋的代码... ... #include <iostream> #include <cstdio> #include <cstring…

P2926 [USACO08DEC]拍头Patting Heads 题目描述 It's Bessie's birthday and time for party games! Bessie has instructed the N (1 <= N <= 100,000) cows conveniently numbered 1..N to sit in a circle (so that cow i [except at the ends] sits next to cows i-1 and…

It's Bessie's birthday and time for party games! Bessie has instructed the N (1 <= N <= 100,000) cows conveniently numbered 1..N to sit in a circle (so that cow i [except at the ends] sits next to cows i-1 and i+1; cow N sits next to cow 1). Meanwhi…

题目描述 It's Bessie's birthday and time for party games! Bessie has instructed the N (1 <= N <= 100,000) cows conveniently numbered 1..N to sit in a circle (so that cow i [except at the ends] sits next to cows i-1 and i+1; cow N sits next to cow 1). Me…

Description It's Bessie's birthday and time for party games! Bessie has instructed the N (1 < N < 100,000) cows conveniently numbered 1..N to sit in a circle (so that cow i [except at the ends] sits next to cows i-1 and i+1; cow N sits next to cow 1…