题目链接:https://vjudge.net/problem/HDU-1300 Pearls Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 2920    Accepted Submission(s): 1464 Problem Description In Pearlania everybody is fond of pearls.…

+)*= +)*= .总共需要的花费是150+=++)*= .在两组数据看来.珍珠都买了高品质的了,而且花费也少了!问题是怎么样能花费最少买珍珠! Add:合并肯定是相邻的合并.比如啊a<b<c的三种品质珍珠,如果把a珍珠和高品质的珍珠,肯定不会跳过b去和c合并,因为a和b或者c合并都达到了减少数量10的目的,然而后者单价上去了.所以就成了相邻单元合并模型的DP. 对第i种珍珠 一:前n-1种按照前面的最优值购买(无后效性),第n种单独买 二:从第k种到第n种数量合并购买,其中k从1取到n H…

+)*= +)*= .总共需要的花费是150+=++)*= .在两组数据看来.珍珠都买了高品质的了,而且花费也少了!问题是怎么样能花费最少买珍珠! Add:合并肯定是相邻的合并.比如啊a<b<c的三种品质珍珠,如果把a珍珠和高品质的珍珠,肯定不会跳过b去和c合并,因为a和b或者c合并都达到了减少数量10的目的,然而后者单价上去了.所以就成了相邻单元合并模型的DP. 对第i种珍珠 一:前n-1种按照前面的最优值购买(无后效性),第n种单独买 二:从第k种到第n种数量合并购买,其中k从1取到n H…

Programming pearls 编程珠玑的题目 这段时间有空都在看编程珠玑,很经典的一本书,一边看一边用 python 做上面的题目,我做的都放到 github 上了 https://github.com/fengyc/programming-pearls-2nd-python. 编程珠玑这书有段历史了,上面有些概念估计现在的学生听都没有听过,像磁带排序.3n+1问题等估计有些人听都没有听过,我花了点时间把相应的东西整理了,性能估算部分是根据现在的计算机速度重新估算了,还挺有意思的. 推荐…

http://acm.hdu.edu.cn/showproblem.php?pid=5009 2014网络赛 西安 比较难的题 Paint Pearls Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 1951    Accepted Submission(s): 631 Problem Description Lee has a str…

Pearls Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 6670 Accepted: 3248 Description In Pearlania everybody is fond of pearls. One company, called The Royal Pearl, produces a lot of jewelry with pearls in it. The Royal Pearl has its name…

Paint Pearls Problem Description   Lee has a string of n pearls. In the beginning, all the pearls have no color. He plans to color the pearls to make it more fascinating. He drew his ideal pattern of the string on a paper and asks for your help. In e…

http://poj.org/problem?id=1260 Pearls Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 8474   Accepted: 4236 Description In Pearlania everybody is fond of pearls. One company, called The Royal Pearl, produces a lot of jewelry with pearls…

Pearls Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 7980 Accepted: 3966 Description In Pearlania everybody is fond of pearls. One company, called The Royal Pearl, produces a lot of jewelry with pearls in it. The Royal Pearl has its name…

传说的SB DP: 题目 Problem Description Lee has a string of n pearls. In the beginning, all the pearls have no color. He plans to color the pearls to make it more fascinating. He drew his ideal pattern of the string on a paper and asks for your help. In eac…

Game with Pearls Problem DescriptionTom and Jerry are playing a game with tubes and pearls. The rule of the game is:1) Tom and Jerry come up together with a number K.2) Tom provides N tubes. Within each tube, there are several pearls. The number of p…

Educational Codeforces Round 6 C. Pearls in a Row 题意:一个3e5范围的序列:要你分成最多数量的子序列,其中子序列必须是只有两个数相同, 其余的数只能出现一次. 策略: 延伸:这里指的延伸如当发现1-1如果以最后出现重叠的数为右边界则就表示左延伸,若以1.0.1..0第二个0前一个位置作为右边界就为右延伸: 开始时想是右延伸,考虑到可能只出现一组两个数相同,认为向左延伸会出错,但是直接WA了之后,发现这并不是题目的坑点(其实只需将最后一组改成左右…

Problem Description In Pearlania everybody is fond of pearls. One company, called The Royal Pearl, produces a lot of jewelry with pearls in it. The Royal Pearl has its name because it delivers to the royal family of Pearlania. But it also produces br…

Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 6647   Accepted: 3241 Description In Pearlania everybody is fond of pearls. One company, called The Royal Pearl, produces a lot of jewelry with pearls in it. The Royal Pearl has its name be…

Pearls Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 2018    Accepted Submission(s): 953 Problem Description In Pearlania everybody is fond of pearls. One company, called The Royal Pearl, pro…

Problem Description Lee has a string of n pearls. In the beginning, all the pearls have no color. He plans to color the pearls to make it more fascinating. He drew his ideal pattern of the string on a paper and asks for your help.  In each operation,…

Paint Pearls Problem Description Lee has a string of n pearls. In the beginning, all the pearls have no color. He plans to color the pearls to make it more fascinating. He drew his ideal pattern of the string on a paper and asks for your help.  In ea…

Paint Pearls 题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=5009 dp+双向链表优化 看到题目,很自然地可以定义状态:dp[i]表示涂好a[0...i]的字符串,花费的最小代价. 状态转移方程:dp[i]=min(dp[i],dp[j]+num2),其中num=从a[j]到a[i]不同的数字个数. 时间复杂度为O(n2),对于n=50000的数据,明显会T. 于是,我们需要进行优化.注意到状态数无法化简,考虑优化转移复杂度. 当区间…

Pearls Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 10558   Accepted: 5489 Description In Pearlania everybody is fond of pearls. One company, called The Royal Pearl, produces a lot of jewelry with pearls in it. The Royal Pearl has its…

C. Pearls in a Row time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output There are n pearls in a row. Let's enumerate them with integers from 1 to n from the left to the right. The pearl number…

Paint Pearls Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 3239    Accepted Submission(s): 1052 Problem Description Lee has a string of n pearls. In the beginning, all the pearls have no color…

C. Pearls in a Row There are n pearls in a row. Let's enumerate them with integers from 1 to n from the left to the right. The pearl number i has the type ai. Let's call a sequence of consecutive pearls a segment. Let's call a segment good if it cont…

Game with Pearls Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others) Total Submission(s): 1914    Accepted Submission(s): 671 Problem Description Tom and Jerry are playing a game with tubes and pearls. The rule of the…

Description In Pearlania everybody is fond of pearls. One company, called The Royal Pearl, produces a lot of jewelry with pearls in it. The Royal Pearl has its name because it delivers to the royal family of Pearlania. But it also produces bracelets…

Dicripntion Lee has a string of n pearls. In the beginning, all the pearls have no color. He plans to color the pearls to make it more fascinating. He drew his ideal pattern of the string on a paper and asks for your help. In each operation, he selec…

C. Pearls in a Row time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output There are n pearls in a row. Let's enumerate them with integers from 1 to n from the left to the right. The pearl number …

Paint Pearls 思路: 离散化+dp+剪枝: dp是个n方的做法: 重要就在剪枝: 如果一个长度为n的区间,有大于根号n种颜色,还不如一个一个涂: 来,上代码: #include <cstdio> #include <cstring> #include <iostream> #include <algorithm> using namespace std; #define maxn 50005 int n,ai[maxn],dp[maxn],ls[…

Description In Pearlania everybody is fond of pearls. One company, called The Royal Pearl, produces a lot of jewelry with pearls in it. The Royal Pearl has its name because it delivers to the royal family of Pearlania. But it also produces bracelets…

C. Pearls in a Row time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output There are n pearls in a row. Let's enumerate them with integers from 1 to n from the left to the right. The pearl number …

转自:http://blog.csdn.net/accelerator_/article/details/39271751 吐血ac... 11668627 2014-09-16 22:15:24 Accepted 5009 1265MS 1980K 2290 B G++ czy   Paint Pearls Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others) Total Subm…