P2854 [USACO06DEC]牛的过山车Cow Roller Coaster dp 对铁轨按左端点排个序,蓝后就是普通的二维dp了. 设$d[i][j]$为当前位置$i$,成本为$j$的最小花费 $d[i+a[u].w][j+a[u].c]=max(d[i+a[u].w][j+a[u].c],d[i][j]+a[u].f)$ #include<iostream> #include<cstdio> #include<cstring> #include<algo…

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…

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…

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 of length L (1 ≤ L ≤ 1,000). The roller coa…

传送门 先按照起点 sort 一遍. 这样每一个点的只由前面的点决定. f[i][j] 表示终点为 i,花费 j 的最优解 状态转移就是一个01背包. ——代码 #include <cstdio> #include <cstring> #include <iostream> #include <algorithm> int L, N, B; ][]; inline int read() { , f = ; char ch = getchar(); ; ) +…

有点类似背包 , 就是那样子搞... ------------------------------------------------------------------------------------ #include<cstdio> #include<cstring> #include<algorithm> #include<iostream> #define rep( i , n ) for( int i = 0 ;  i < n ; ++i…

Description 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 of length L (1 <= L <= 1,000). The…

http://www.lydsy.com/JudgeOnline/problem.php?id=1649 又是题解... 设f[i][j]表示费用i长度j得到的最大乐趣 f[i][end[a]]=max{f[i-cost[a][begin[a]]+w[a]} 当f[i-cost[a][begin[a]]可行时 初始化f=-1 f[0][0]=0 #include <cstdio> #include <cstring> #include <cmath> #include…

http://www.lydsy.com/JudgeOnline/problem.php?id=1649 Time Limit: 5 Sec  Memory Limit: 64 MBSubmit: 743  Solved: 370[Submit][Status][Discuss] Description The cows are building a roller coaster! They want your help to design as fun a roller coaster as…

傻逼dp题. dp[i][j]表示用了i长度已花费成本j所能得到的价值. 然后枚举一下铁轨随便做了. 不行就sort一下. #include<bits/stdc++.h> #define inf 1000000007 typedef long long ll; using namespace std; ]; ll f[][]; bool cmp(Node a,Node b){ if(a.s==b.s)return a.w<b.w; return a.s<b.s; } inline…