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P2868 [
USACO07DEC
]Sightseeing Cows G
题意描述 Sightseeing Cows G 给定一张有向图,图中每个点都有点权 \(a_i\),每条边都有边权 \(e_i\)。 求图中一个环,使 “环上个点权之和” 除以 “环上各边权之和” ......
Sightseeing
Cows
int
sum
USACO07DEC
Luogu2869 [
USACO07DEC
]美食的食草动物Gourmet Grazers (贪心,二分,数据结构优化)
贪心 考场上因无优化与卡常T掉的\(n \log(n)\) //include <iostream> include <cstdio> include <cstring> include <algorithm> include <cmath> define R ......
define
int
include
food
day
[
USACO07DEC
]Sightseeing Cows
嘟嘟嘟 这题好像属于01分数规划问题,叫什么最优比率生成环。 题目概括一下,就是求一个环,满足∑v[i] / ∑c[i]最大。 我们可以堆上面的式子变个型:令 x = ∑v[i] / ∑c[ ......
Cows
Sightseeing
int
include
push
[
USACO07DEC
]Sightseeing Cows
嘟嘟嘟 这题好像属于01分数规划问题,叫什么最优比率生成环。 题目概括一下,就是求一个环,满足∑v[i] / ∑c[i]最大。 我们可以堆上面的式子变个型:令 x = ∑v[i] / ∑c[ ......
Cows
Sightseeing
int
include
push
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