HDU-1171 Big Event in HDU (多重背包)
来源:互联网 发布:清朝灭亡 知乎 编辑:程序博客网 时间:2024/05/17 04:00
Big Event in HDU
Time Limit: 10000/5000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 44674 Accepted Submission(s): 15369
Problem Description
Nowadays, we all know that Computer College is the biggest department in HDU. But, maybe you don't know that Computer College had ever been split into Computer College and Software College in 2002.
The splitting is absolutely a big event in HDU! At the same time, it is a trouble thing too. All facilities must go halves. First, all facilities are assessed, and two facilities are thought to be same if they have the same value. It is assumed that there is N (0<N<1000) kinds of facilities (different value, different kinds).
The splitting is absolutely a big event in HDU! At the same time, it is a trouble thing too. All facilities must go halves. First, all facilities are assessed, and two facilities are thought to be same if they have the same value. It is assumed that there is N (0<N<1000) kinds of facilities (different value, different kinds).
Input
Input contains multiple test cases. Each test case starts with a number N (0 < N <= 50 -- the total number of different facilities). The next N lines contain an integer V (0<V<=50 --value of facility) and an integer M (0<M<=100 --corresponding number of the facilities) each. You can assume that all V are different.
A test case starting with a negative integer terminates input and this test case is not to be processed.
A test case starting with a negative integer terminates input and this test case is not to be processed.
Output
For each case, print one line containing two integers A and B which denote the value of Computer College and Software College will get respectively. A and B should be as equal as possible. At the same time, you should guarantee that A is not less than B.
Sample Input
210 120 1310 1 20 230 1-1
Sample Output
20 1040 40
#include <bits/stdc++.h>using namespace std;int a[51], c[51], dp[130000];int main(){int n;while(scanf("%d", &n) != EOF){if(n < 0) return 0;int tot = 0;for(int i = 1; i <= n; ++i){scanf("%d %d", &a[i], &c[i]);tot += a[i] * c[i];}int ans = tot / 2;memset(dp, 0, sizeof(dp));for(int i = 1; i <= n; ++i){for(int j = 1; j <= c[i]; j *= 2){int v = j * a[i];for(int k = ans; k >= v; --k){dp[k] = max(dp[k], dp[k - v] + v);}c[i] -= j;}if(c[i]){int v = c[i] * a[i];for(int k = ans; k >= v; --k){dp[k] = max(dp[k], dp[k - v] + v);}}}printf("%d %d\n", tot - dp[ans], dp[ans]);}}/*题意:50种设备,每种设备不超过100个,每种设备的价值不超过50,将这些设备分成价值尽量接近的两部分。思路:转换成多重背包问题。背包容量为所有设备总价值的一半sum/2。那么一部分就是dp[sum/2],一部分是sum-dp[sum/2]。坑点:最后是文件尾是负数,不是-1.WA到三观毁灭。*/
阅读全文
0 0
- hdu 1171 Big Event in HDU(01背包&多重背包)
- HDU Big Event in HDU - 多重背包
- hdu 1171多重背包Big Event in HDU
- hdu 1171 Big Event in HDU 多重背包
- hdu 1171 Big Event in HDU(多重背包可行性)
- HDU 1171 Big Event in HDU(多重背包)
- Hdu 1171 Big Event in HDU (多重背包)
- HDU 1171 Big Event in HDU(多重背包)
- hdu 1171 Big Event in HDU(多重背包)
- hdu 1171 Big Event in HDU 多重背包基础题
- hdu 1171 Big Event in HDU (多重背包)
- hdu 1171 Big Event in HDU 多重背包
- HDU 1171 Big Event in HDU (多重背包)
- hdu 1171 Big Event in HDU 多重背包
- hdu 1171 Big Event in HDU --- 多重背包
- 多重背包hdu 1171Big Event in HDU
- HDU 1171 Big Event in HDU 动态规划 多重背包
- hdu 1171 Big Event in HDU 多重背包
- mysql数据库-1.文件导入mysql表secure_file_priv报错问题解决
- 数据库分库分表
- sort
- tensorflow实现单层感知机对MNIST分类
- 3*3的矩阵转置
- HDU-1171 Big Event in HDU (多重背包)
- 设计模式---装饰模式
- Eclipse安装svn插件的几种方式
- 2.Spark Streaming:基本工作原理
- 进程间的通信----有名管道fifo
- 使用Python绘制雷达图
- 卡尔曼滤波和维纳滤波
- ubuntu繁体字简体字切换
- 用Leangoo管理你的项目