G.Interference Signal Time Limit: 2 Sec  Memory Limit: 128 MB Submit: 35  Solved: 17 [Submit][Status][Web Board] Description Dr.Kong’s laboratory monitor some interference signals. The interference signals can be digitized into a series of positive i…

10411: F.Distribution Time Limit: 1 Sec  Memory Limit: 128 MB Submit: 11  Solved: 8 [Submit][Status][Web Board] Description One day , Wang and Dong in the Dubai desert expedition, discovered an ancient castle. Fortunately, they found a map of the cas…

D.引水工程 Time Limit: 2 Sec  Memory Limit: 128 MB Submit: 118  Solved: 41 [Submit][Status][Web Board] Description 南水北调工程是优化水资源配置.促进区域协调发展的基础性工程,是新中国成立以来投资额最大.涉及面最广的战略性工程,事关中华民族长远发展. “南水北调工程”,旨在缓解中国华北和西北地区水资源短缺的国家战略性工程.就是把中国长江流域丰盈的水资源抽调一部分送到华北和西北地区.我国南涝北…

C.最少换乘 Time Limit: 2 Sec  Memory Limit: 128 MB Submit: 94  Solved: 25 [Submit][Status][Web Board] Description 欧洲某城是一个著名的旅游胜地,每年都有成千上万的人前来观光旅行.Dr. Kong决定利用暑假好好游览一番.. 年轻人旅游不怕辛苦,不怕劳累,只要费用低就行.但Dr. Kong年过半百,他希望乘坐BUS从住的宾馆到想去游览的景点,期间尽可量地少换乘车. Dr. Kon买了一张旅游地…

B.最大岛屿 Time Limit: 1 Sec  Memory Limit: 128 MB Submit: 30  Solved: 18 [Submit][Status][Web Board] Description 神秘的海洋,惊险的探险之路,打捞海底宝藏,激烈的海战,海盗劫富等等.加勒比海盗,你知道吧?杰克船长驾驶着自己的的战船黑珍珠1号要征服各个海岛的海盜,最后成为海盗王.  这是一个由海洋.岛屿和海盗组成的危险世界.面对危险重重的海洋与诡谲的对手,如何凭借智慧与运气,建立起一个强大的海…

G.Code the Tree Time Limit: 2 Sec  Memory Limit: 128 MB Submit: 35  Solved: 18 [Submit][Status][Web Board] Description A tree (i.e. a connected graph without cycles) with vertices numbered by the integers 1, 2, ..., n is given. The "Prufer" code…

Constructing Roads Time Limit: 2000MS   Memory Limit: 65536K               Description There are N villages, which are numbered from 1 to N, and you should build some roads such that every two villages can connect to each other. We say two village A…

1488: River Crossing Time Limit: 1 Sec  Memory Limit: 128 MB Submit: 83  Solved: 42 SubmitStatusWeb Board Description Afandi is herding N sheep across the expanses of grassland  when he finds himself blocked by a river. A single raft is available for…

题目传送门 题意:每天能往存钱罐加任意实数的钱,每天不能多于起那一天放的钱数.如果某一天的钱数恰好等于那天的特价商品,则可以买,求最后的最大快乐值. 思路:先来一段来自出题人的题解: 显然的贪心:如果第$i$天买完,准备在第$j$天买,那么显然最优是在$i+1$到j天放$wi/(j-i)$的钱. 于是假定选择的物品是$k1,k2,k3… $那么必须满足: $a[ki]/(ki-ki-1)<=a[ki-1]/(ki-1-ki-2)$ 令$f[i][j]$表示最后购买的两个物品为i和j,则$f[i]…

G.Interference Signal 时间限制: 2 Sec  内存限制: 128 MB提交: 47  解决: 18[提交][状态] 题目描述 Dr.Kong’s laboratory monitor some interference signals. The interference signals can be digitized into a series of positive integer. May be, there are N integers a1,a2,…,an. D…