蒟蒻难得可以去比赛,GDOI也快到了,还是认真刷题(不会告诉你之前都在颓废),KPM 神犇既然都推荐刷USACO, 辣就刷刷. 现在蒟蒻还没刷完,太蒟刷得太慢,so 写了的搞个简易题解(没代码,反正NOCOW一堆) x_y_z(表示 Section x.y 的第z题) 1_1_1 这个..... ASCII码搞一搞就好了吧... 1_1_2 直接模拟,注意均分后剩下的钱还是他的 1_1_3 日期的题最难受了,直接模拟往下推就好了 1_1_4 枚举断开的位置,然后爆枚左右,注意处理 w 如果左右第…

Network of SchoolsIOI '96 Day 1 Problem 3 A number of schools are connected to a computer network. Agreements have been developed among those schools: each school maintains a list of schools to which it distributes software (the "receiving schools&qu…

//毕竟我不是dd牛,USACO的题解也不可能一句话带过的…… 题目链接:http://cerberus.delos.com:790/usacoprob2?a=pWvHFwGsTb2&S=packrec 题目大意就是给定四个矩形,让你找到一个面积最小的矩形使得这四个矩形都能放进去(不能重叠),要求输出最小矩形的面积以及长宽(可能有多个矩形都具有最小面积). 既然题目里已经给了六种模型(第4种和第5种其实是一样的),那就一种一种写吧. 没有什么特别的算法,就是搜索.每个矩形都可以横放或者竖放,所以…

题面 枚举每个数字是否能被删去,然后就是如何判定图是否存在.应该从按“度数”从大到小排序,从最大的顺次向其他点连边(先连“度数”小的可能会把一些可以和大“度数”点连接的点用掉).但是这个排序每连一次都要做一次,而$N<=500$的情况下$O(n^3log$ $n)$并不能过.但是发现度数最多只有$n$,所以可以桶排,水过=.= USACO官方题解说可以再套一个数据结构变成$O(n^2log$ $n)$,然而并不会做 #include<cstdio> #include<cstring…

Electric Fence题解 Don Piele In this problem, `lattice points' in the plane are points with integer coordinates. In order to contain his cows, Farmer John constructs a triangular electric fence by stringing a "hot" wire from the origin (0,0) to a…

UPD:我真不是想骗访问量TAT..一开始没注意总长度写着写着网页崩了王仓(其实中午的时候就时常开始卡了= =)....损失了2h(幸好长一点的都单独开了一篇)....吓得赶紧分成两坨....TAT.............. —————————————————————————————————————————————————————————————————————————————— 写(被虐)了整整一个月b站上usaco的金组题...然而到现在总共只写了100道上下TAT(当然是按AC人数降序排…

usaco ch1.4 sort(d , d + c, [](int a, int b) -> bool { return a > b; }); 生成与过滤 generator&&filter dfs:简化多重循环,枚举点对与判环 洛谷OJ P1209 [USACO1.3]修理牛棚 Barn Repair P1444 [USACO1.3]虫洞wormhole P3650 [USACO1.3]滑雪课程设计Ski Course Design P2693 [USACO1.3]号码锁…

[题解]晋升者计数 Promotion Counting [USACO 17 JAN] [P3605] 奶牛们又一次试图创建一家创业公司,还是没有从过去的经验中吸取教训.!牛是可怕的管理者! [题目描述] 奶牛从 \(1\) ~ \(N(1≤N≤1e5)\) 进行了编号,把公司组织成一棵树,\(1\)号奶牛作为总裁(树的根节点).除总裁以外的每头奶牛都有且仅有唯一的一个的上司(即它在树上的父结点).每一头牛\(i\)都有一个不同的能力指数 \(p(i)\),描述了她对其工作的擅长程度.如果奶牛…

Ski Course Design Farmer John has N hills on his farm (1 <= N <= 1,000), each with an integer elevation in the range 0 .. 100. In the winter, since there is abundant snow on these hills, FJ routinely operates a ski training camp. Unfortunately, FJ h…

Wormholes Farmer John's hobby of conducting high-energy physics experiments on weekends has backfired, causing N wormholes (2 <= N <= 12, N even) to materialize on his farm, each located at a distinct point on the 2D map of his farm (the x,y coordin…