bzoj_1625_ [Usaco2007_dec]_ Gemstone Bracelet _ (01 backpack)

Describe

http://www.lydsy.com/JudgeOnline/problem.php?id=1625

01 Backpack Nude questions.

P.S. It's a water problem.

Analysis

...

1#include <bits/stdc++.h>2 using namespacestd;3 4 Const intmaxn=3500, maxw=13000;5 intn,m;6 intW[MAXN],V[MAXN],DP[MAXW];7 intMain () {8scanf"%d%d",&n,&m);9      for(intI=1; i<=n;i++) scanf ("%d%d",&w[i],&v[i]);Ten      for(intI=1; i<=n;i++) for(intj=m;j>=w[i];j--) Dp[j]=max (dp[j],dp[j-w[i]]+v[i]); Oneprintf"%d\n", Dp[m]); A     return 0; -printf"%lf\n", f[i][n+1]); -}

View Code

1625: [Usaco2007 Dec] Gemstone bangle time limit:5 Sec Memory limit:64 MB
submit:1139 solved:782
[Submit] [Status] [Discuss]

Description

When Bessie was wandering around the jewellery shop, she bought a favorite bracelet. Naturally, she wanted to choose the best ones from the N (1 <= n <= 3,402) Gems She had collected on the bracelet. For the block I gem, it weighs w_i (1 <= w_i <= 400), and Bessie knows that it can add a charm value to itself after the bracelet is inlaid d_i (1 <= d_i <= 100). Since Bessie can only tolerate bracelets that weigh no more than M (1 <= m <= 12,880), she may not be able to set all her favorite gems. So Bessie finds you, tells you all the attributes of her gems and the weight she can tolerate, and I hope you can help her calculate how much her charm will increase by the most reasonable set of gems.

Input

* Line 1th: 2 integers separated by a space: N and M

* 2nd. N+1: Section i+1 Acts 2 integers separated by spaces: w_i, D_i, respectively, the weight of the jewel of Block I and the charm value that can be added to Bessie

Output

* Line 1th: Output 1 integers, indicating that Bessie can add up to the most attractive values according to the mosaic requirements

Sample Input

4 6
1 4
2 6
3 12
2 7

Input Description:

Bessie collected 4 jewels, and she could tolerate a bracelet with a maximum weight of 6.

Sample Output

23

Output Description:

Bessie put bracelets on all the remaining gems except the second gem, so that she could increase
The charm value of the 4+12+7=23, and the weight of all gemstones is 1+2+3 <= 6, also meet the requirements.

HINT

Source

Silver

bzoj_1625_ [Usaco2007_dec]_ Gemstone Bracelet _ (01 backpack)