传送门:hdu 5800 To My Girlfriend 题意:给定n个物品,其中i,j必选,l,m必不选,问组成体积为s的方法一共有多少种 思路:定义dp[i][j][s1][s2],表示前i种物品能够构成的体积为j,其中有s1种定为必选,s2种定为不必选;因为递推到第i层时,只与第i-1层有关,所以把第一维降到2来省内存.然后就是dp[i][j][s1][s2]=dp[i-1][j][s1][s2]+dp[i-1][j][s1][s2-1]+dp[i-1][j-a[i]][s1-1][s2…
题目链接: http://acm.hdu.edu.cn/showproblem.php?pid=5800 To My Girlfriend Time Limit: 2000/2000 MS (Java/Others)Memory Limit: 65536/65536 K (Java/Others) 问题描述 Dear Guo I never forget the moment I met with you.You carefully asked me: "I have a very diffic…
To My Girlfriend Time Limit: 2000/2000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 1326 Accepted Submission(s): 515 Problem Description Dear GuoI never forget the moment I met with you.You carefully asked me:…
Problem To My Girlfriend (HDU 5800) 题目大意 给定一个由n个元素组成的序列,和s (n<=1000,s<=1000) 求 : f (i,j,k,l,m) 指必定选第i,j号元素,必定不选k,l号元素,选的元素总和为m的子集个数. 解题分析 一开始想了个n^3的DP,f[j][k]表示选j个数总和为k的方案数,然后一直想着怎么去优化,陷进死胡同,到比赛结束还没想出来. 看了题解后,感觉智商被藐视了. 题解的做法是f[i][j][s1][s2]表示前i个数总…
To My Girlfriend Time Limit: 2000/2000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 1288 Accepted Submission(s): 492 Problem Description Dear Guo I never forget the moment I met with you.You carefully asked me:…
题目 Source http://acm.hdu.edu.cn/showproblem.php?pid=5800 Description Dear Guo I never forget the moment I met with you.You carefully asked me: "I have a very difficult problem. Can you teach me?".I replied with a smile, "of course".&qu…
LCM Walk Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://acm.hdu.edu.cn/showproblem.php?pid=5584 Description A frog has just learned some number theory, and can't wait to show his ability to his girlfriend. Now the frog is sitting on a grid map o…
Life Winner Bo 题目链接: http://acm.hdu.edu.cn/showproblem.php?pid=5754 Description Bo is a "Life Winner".He likes playing chessboard games with his girlfriend G. The size of the chessboard is N×M.The top left corner is numbered(1,1) and the lower r…
A Sweet Journey Time Limit: 1 Sec Memory Limit: 256 MB 题目连接 http://acm.hdu.edu.cn/showproblem.php?pid=5477 Description Master Di plans to take his girlfriend for a travel by bike. Their journey, which can be seen as a line segment of length L, is a r…
Problem Description Marica is very angry with Mirko because he found a new girlfriend and she seeks revenge.Since she doesn't live in the same city, she started preparing for the long journey.We know for every road how many minutes it takes to come f…
Couple doubi Time Limit:1000MS Memory Limit:32768KB 64bit IO Format:%I64d & %I64u Submit Status Practice HDU 4861 Description DouBiXp has a girlfriend named DouBiNan.One day they felt very boring and decided to play some games. The rule of th…
题目链接 :http://acm.hdu.edu.cn/showproblem.php?pid=6030 Problem Description Little Q wants to buy a necklace for his girlfriend. Necklaces are single strings composed of multiple red and blue beads. Little Q desperately wants to impress his girlfriend,…
HDU 3085 Nightmare Ⅱ(噩梦 Ⅱ) Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others) Problem Description - 题目描述 Last night, little erriyue had a horrible nightmare. He dreamed that he and his girl friend were trapped in a…
[hdu P3085] Nightmare Ⅱ Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 2885 Accepted Submission(s): 806 Problem DescriptionLast night, little erriyue had a horrible nightmare. He dreamed that he a…
http://acm.hdu.edu.cn/showproblem.php?pid=5500 Reorder the Books Time Limit: 4000/2000 MS (Java/Others) Memory Limit: 131072/131072 K (Java/Others)Total Submission(s): 920 Accepted Submission(s): 502 Problem Description dxy has a collection of…
http://acm.hdu.edu.cn/showproblem.php?pid=5500 Reorder the Books Time Limit: 4000/2000 MS (Java/Others) Memory Limit: 131072/131072 K (Java/Others)Total Submission(s): 942 Accepted Submission(s): 519 Problem Description dxy has a collection of…
Nightmare Ⅱ Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 720 Accepted Submission(s): 136 Problem Description Last night, little erriyue had a horrible nightmare. He dreamed that he and his…
pid=5145">[HDU 5145] NPY and girls(组合+莫队) NPY and girls Time Limit: 8000/4000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 593 Accepted Submission(s): 179 Problem Description NPY's girlfriend blew him out!H…
Time Limit: 6000/3000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 677 Accepted Submission(s): 321 Problem Description We know that Daizhenyang is chasing a girlfriend. As we all know, whenever you chase a beautiful…
2019 杭电多校 10 1003 题目链接:HDU 6693 比赛链接:2019 Multi-University Training Contest 10 Problem Description Oipotato loves his girlfriend very much. Since Valentine's Day is coming, he decides to buy some presents for her. There are \(n\) presents in the shop…
find the longest of the shortest Time Limit: 1000/5000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 2702 Accepted Submission(s): 974 Problem Description Marica is very angry with Mirko because he found a new gi…
Saving HDU Time Limit: 3000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 7194 Accepted Submission(s): 3345 Problem Description 话说上回讲到海东集团面临内外交困,公司的元老也只剩下XHD夫妇二人了.显然,作为多年拼搏的商人,XHD不会坐以待毙的. 一天,当他正在苦思冥想解困良策的…
http://acm.hdu.edu.cn/showproblem.php?pid=3037 Lucas定理模板. 现在才写,noip滚粗前兆QAQ #include<cstdio> #include<cstring> #include<algorithm> using namespace std; typedef long long ll; int jc[100003]; int p; int ipow(int x, int b) { ll t = 1, w = x;…
Special equations Time Limit:1000MS Memory Limit:32768KB 64bit IO Format:%I64d & %I64u Submit Status Practice HDU 4569 Description Let f(x) = a nx n +...+ a 1x +a 0, in which a i (0 <= i <= n) are all known integers. We call f(x) 0 (mod…
The kth great number Time Limit:1000MS Memory Limit:65768KB 64bit IO Format:%I64d & %I64u Submit Status Practice HDU 4006 Description Xiao Ming and Xiao Bao are playing a simple Numbers game. In a round Xiao Ming can choose to write down a nu…
How many integers can you find Time Limit:5000MS Memory Limit:32768KB 64bit IO Format:%I64d & %I64u Submit Status Practice HDU 1796 Description Now you get a number N, and a M-integers set, you should find out how many integers which are sm…
