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UVA - 10273 Eat or Not to Eat?
Description Problem E Eat or not to Eat? Input: Standard Input Output: Standard Output A young farmer has N cows, but they produced really really a ve ...
分类:其他好文   时间:2017-05-27 10:42:17    阅读次数:183
POJ 2181 Jumping Cows DP
题意:n<=2e5件物品 按照1~n顺序选择物品,每件物品可以拿或者不拿,奇数次拿物品分数+a[i],偶数次拿分数-a[i] 问最大得分?显然每件物品有2种状态,第奇数次拿,第偶数次拿(不拿话 ans就不统计第i个)设dp[i][1,2] 前i件物品 最后一件状态i为1,2;dp[i][1]=max ...
分类:其他好文   时间:2017-05-27 00:50:10    阅读次数:187
windows下安装pywin32报错:close failed in file object destructor:sys.excepthook is missing lost sys.stderr
今晚要写搜索引擎作业,搭scrapy环境,遇到了下面问题: windows下安装pywin32报错:close failed in file object destructor:sys.excepthook is missing lost sys.stderr 解决方法: 1.右键管理员身份运行cm ...
分类:Windows程序   时间:2017-05-26 23:31:26    阅读次数:1716
[luoguP3052] [USACO12MAR]摩天大楼里的奶牛Cows in a Skyscraper(DP)
传送门 输出被阉割了。 只输出最少分的组数即可。 f 数组为结构体 f[S].cnt 表示集合 S 最少的分组数 f[S].v 表示集合 S 最少分组数下当前组所用的最少容量 f[S] = min(f[S], f[S - i] + a[i]) (i ∈ S) 运算重载一下即可。 ——代码 1 #in ...
分类:其他好文   时间:2017-05-26 20:38:53    阅读次数:296
oracel 数据库问题 ORA-12547 ORA-12571 解决记录
Oracel 业务数据库近期频繁出现:ORA-12547:TNS:lost contact 和 ORA-12571:TNS:packet writer failure 错误 排除了端口及监听程序的问题,最终解决办法: 将Sqlnet.ora文件中的SQLNET.AUTHENTICATION_SERV ...
分类:数据库   时间:2017-05-26 15:11:13    阅读次数:226
贪心 洛谷P2870 [USACO07DEC]最佳牛线,黄金Best Cow Line, Gold
[USACO07DEC]最佳牛线,黄金Best Cow Line, Gold 题目描述 FJ is about to take his N (1 ≤ N ≤ 30,000) cows to the annual"Farmer of the Year" competition. In this con ...
分类:其他好文   时间:2017-05-26 00:51:30    阅读次数:248
POJ 3281(Dining-网络流拆点)[Template:网络流dinic]
Language: Default Dining Time Limit: 2000MS Memory Limit: 65536K Total Submissions: 9631 Accepted: 4446 Description Cows are such finicky eaters. Each ...
分类:其他好文   时间:2017-05-25 20:47:59    阅读次数:250
POJ2481:Cows(树状数组)
Description Farmer John's cows have discovered that the clover growing along the ridge of the hill (which we can think of as a one-dimensional number ...
分类:编程语言   时间:2017-05-25 18:58:18    阅读次数:269
[USACO06DEC] Milk Patterns
Description Farmer John has noticed that the quality of milk given by his cows varies from day to day. On further investigation, he discovered that al ...
分类:其他好文   时间:2017-05-25 13:35:13    阅读次数:253
[luoguP2858] [USACO06FEB]奶牛零食Treats for the Cows(DP)
传送门 f[i][j][k] 表示 左右两段取到 i .... j 时,取 k 次的最优解 可以优化 k 其实等于 n - j + i 则 f[i][j] = max(f[i + 1][j] + a[i] * (n - j + i), f[i][j - 1] + a[j] * (n - j + i) ...
分类:其他好文   时间:2017-05-24 10:03:00    阅读次数:198
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