P2853 [USACO06DEC]牛的野餐Cow Picnic 题目描述 The cows are having a picnic! Each of Farmer John's K (1 ≤ K ≤ 100) cows is grazing in one of N (1 ≤ N ≤ 1,000) pastures, conveniently numbered 1...N. The pastures are connected by M (1 ≤ M ≤ 10,000) one-way path…
P2853 [USACO06DEC]牛的野餐Cow Picnic 题目描述 The cows are having a picnic! Each of Farmer John's K (1 ≤ K ≤ 100) cows is grazing in one of N (1 ≤ N ≤ 1,000) pastures, conveniently numbered 1...N. The pastures are connected by M (1 ≤ M ≤ 10,000) one-way path…
题目描述 The cows are having a picnic! Each of Farmer John's K (1 ≤ K ≤ 100) cows is grazing in one of N (1 ≤ N ≤ 1,000) pastures, conveniently numbered 1...N. The pastures are connected by M (1 ≤ M ≤ 10,000) one-way paths (no path connects a pasture to…
P2853 [USACO06DEC]牛的野餐Cow Picnic 你愿意的话,可以写dj. 然鹅,对一个缺时间的退役选手来说,暴力模拟是一个不错的选择. 让每个奶牛都把图走一遍,显然那些被每个奶牛都走过的点就是符合条件的点. #include<iostream> #include<cstdio> #include<cstring> using namespace std; #define N 1002 int val[N],in[N],k,n,m,ans; bool d…
------------------------- 长时间不写代码了,从学校中抽身出来真的不容易啊 ------------------------ 链接:Miku ----------------------- 这道题的思路就在于建反图,如果每一头牛都能到达的话,那么在反图上,这个点也一定能到达每一头牛. 那么我们的目的就明确了,找到所有能在反图上找到每一头牛的点. ----------------------- #include<iostream> #include<cstdio&g…
题目描述 The cows are having a picnic! Each of Farmer John's \(K (1 ≤ K ≤ 100)\) cows is grazing in one of \(N (1 ≤ N ≤ 1,000)\) pastures, conveniently numbered \(1...N\). The pastures are connected by \(M (1 ≤ M ≤ 10,000)\) one-way paths (no path connec…
题目描述 The cows are having a picnic! Each of Farmer John's K (1 ≤ K ≤ 100) cows is grazing in one of N (1 ≤ N ≤ 1,000) pastures, conveniently numbered 1...N. The pastures are connected by M (1 ≤ M ≤ 10,000) one-way paths (no path connects a pasture to…
P2854 [USACO06DEC]牛的过山车Cow Roller Coaster 题目描述 The cows are building a roller coaster! They want your help to design as fun a roller coaster as possible, while keeping to the budget. The roller coaster will be built on a long linear stretch of land o…
P3080 [USACO13MAR]牛跑The Cow Run 题目描述 Farmer John has forgotten to repair a hole in the fence on his farm, and his N cows (1 <= N <= 1,000) have escaped and gone on a rampage! Each minute a cow is outside the fence, she causes one dollar worth of dam…
https://www.luogu.org/problem/show?pid=3029 题目描述 Farmer John has hired a professional photographer to take a picture of some of his cows. Since FJ's cows represent a variety of different breeds, he would like the photo to contain at least one cow fro…