USACO 利润Profits

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洛谷P3009 [USACO11JAN]利润Profits 题解 https://www.luogu.org/problemnew/solution/P3009 JDOJ 2727: USACO 2011 Jan Silver 1.Profits https://neooj.com/oldoj/problem.php?id=2727 题目描述 The cows have opened a new business, and Farmer John wants to see how well t…

[USACO11JAN]利润Profits

题目描述 The cows have opened a new business, and Farmer John wants to see how well they are doing. The business has been running for N (1 <= N <= 100,000) days, and every day i the cows recorded their net profit P_i (-1,000 <= P_i <= 1,000). Farm…

洛谷 P3009 [USACO11JAN]利润Profits

嗯... 题目链接:https://www.luogu.org/problemnew/show/P3009 这是DP的另一个功能,求最大子段和(最大子段和模板:https://www.luogu.org/problemnew/show/P1115),动态转移方程为: dp[i] = max(a[i], dp[i - ] + a[i]); AC代码: #include<cstdio> #include<iostream> #include<algorithm> using…

【 USACO11JAN】利润【洛谷P3009】

P3009 [USACO11JAN]利润Profits 题目描述 The cows have opened a new business, and Farmer John wants to see how well they are doing. The business has been running for N (1 <= N <= 100,000) days, and every day i the cows recorded their net profit P_i (-1,000…

【COGS】714. USACO 1.3.2混合牛奶（贪心+水题）

http://cojs.tk/cogs/problem/problem.php?pid=714 在hzwer的刷题记录上,默默地先跳过2题T_T...求凸包和期望的..T_T那是个啥..得好好学习看到这题,. 太水了. 按价值排序后计算即可.(本来不想放题解的,但是为了满足下自己的虚荣心吧) #include <cstdio> #include <cstring> #include <cmath> #include <string> #include &l…

[USACO精选] 第二章动态规划（一）

#4 公司利润 2014-01-16 这真的是动归?怎么觉得有点贪心的心态在.时间复杂度O(N),空间复杂度O(1),轻松加愉快!唯一要注意的是ANS一开始要赋负值,因为最终答案可能是负的. ; var n,i,x,ans,last:longint; a:..] of longint; begin ans:=-maxlongint+; readln(n); to n do begin readln(x); then last:=x+last else last:=x; if last>ans t…