题目链接:https://www.luogu.org/problemnew/show/P2984 练习SPFA,把FJ当做起点,求出到所有牛的最短路,再把两个牛的相加. #include <cstdio> #include <queue> #include <iostream> #include <algorithm> #include <cstring> using namespace std; ; const int inf = 0x7fff…

题目描述 Farmer John is distributing chocolates at the barn for Valentine's day, and B (1 <= B <= 25,000) of his bulls have a special cow in mind to receive a chocolate gift. Each of the bulls and cows is grazing alone in one of the farm's N (2*B <=…

https://www.luogu.org/problem/show?pid=2984 题目描述 Farmer John is distributing chocolates at the barn for Valentine's day, and B (1 <= B <= 25,000) of his bulls have a special cow in mind to receive a chocolate gift. Each of the bulls and cows is graz…

洛谷 P2984 [USACO10FEB]给巧克力Chocolate Giving 洛谷传送门 JDOJ 2680: USACO 2010 Feb Silver 2.Chocolate Giving JDOJ传送门 Description Farmer John is distributing chocolates at the barn for Valentine's day, and B (1 <= B <= 25,000) of his bulls have a special cow…