这个题有点意思,其实不是特别难,但是不太好想...中间用二分找最大的可买长度就行了. 题干: 题目描述 Farmer John <= K <= ), each with value ..,,. FJ would like to make a sequence of N purchases ( <= N <= ,), <= c(i) <= ,). As he makes this sequence of purchases, he can periodically sto…
将金币状压,然后就没多说的了. #include <iostream> #include <cstdio> #include <cstring> #include <algorithm> #include <cmath> #define R(a,b,c) for(register int a = (b); a <= (c); ++ a) #define nR(a,b,c) for(register int a = (b); a >=…
P3092 [USACO13NOV]没有找零No Change 题目描述 Farmer John is at the market to purchase supplies for his farm. He has in his pocket K coins (1 <= K <= 16), each with value in the range 1..100,000,000. FJ would like to make a sequence of N purchases (1 <= N…
题目描述 Farmer John is at the market to purchase supplies for his farm. He has in his pocket K coins (1 <= K <= 16), each with value in the range 1..100,000,000. FJ would like to make a sequence of N purchases (1 <= N <= 100,000), where the ith p…
题目描述 Farmer John is at the market to purchase supplies for his farm. He has in his pocket K coins (1 <= K <= 16), each with value in the range 1..100,000,000. FJ would like to make a sequence of N purchases (1 <= N <= 100,000), where the ith p…
[BZOJ3312][Usaco2013 Nov]No Change Description Farmer John is at the market to purchase supplies for his farm. He has in his pocket K coins (1 <= K <= 16), each with value in the range 1..100,000,000. FJ would like to make a sequence of N purchases…
题目描述 Farmer John is at the market to purchase supplies for his farm. He has in his pocket K coins (1 <= K <= 16), each with value in the range 1..100,000,000. FJ would like to make a sequence of N purchases (1 <= N <= 100,000), where the ith p…
Description Farmer John is at the market to purchase supplies for his farm. He has in his pocket K coins (1 <= K <= 16), each with value in the range 1..100,000,000. FJ would like to make a sequence of N purchases (1 <= N <= 100,000), where th…
Description 约翰带着 N 头奶牛在超市买东西,现在他们正在排队付钱,排在第 i 个位置的奶牛需要支付 Ci元.今天说好所有东西都是约翰请客的,但直到付账的时候,约翰才意识到自己没带钱,身上只有 K张消费卡,第 i 张卡里有 Vi 元余额. 问题是,这些消费卡都是一次性的,它们可以被收银机读取,但如果卡一旦离开了收银机,卡里的余额就会归零,而且超市也不负责找零!奶牛的队伍很长,不可能再调整她们的位置了,所以一张卡只能支付一段连在一起的账单.而且,一张账单只能用一张消费卡支付,超市的系统…
ZOJ Monthly, August 2014 E题 ZOJ月赛 2014年8月 E题 http://acm.zju.edu.cn/onlinejudge/showProblem.do?problemId=5334 Easy 2048 Again Time Limit: 2 Seconds Memory Limit: 65536 KB Dark_sun knows that on a single-track road (which means once he passed this…
有的DP题,某一部分的状态只有两种,选或不选. 开数组记录,代价太大,转移不方便. 状态压缩意为,用 “0/1“ 表示 “选/不选“ . 把状态表示为二进制整数. There are 10 kinds of people in the world, who knows binary and who doesn't. 用位运算判断条件并转移状态. hdu 6149 Valley Numer II 题目传送门 用f[i][j]表示选到前i个点,状态为j的答案. 枚举其他两个高点. 转移之前判断之前是…
方格取数(2) Time Limit: 10000/5000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 6206 Accepted Submission(s): 1975 Problem Description 给你一个m*n的格子的棋盘,每个格子里面有一个非负数. 从中取出若干个数,使得任意的两个数所在的格子没有公共边,就是说所取数所在的2个格子不能相邻,并且取出的…
