HDU-1059 Dividing (多重背包)
2017-01-11 17:23
363 查看
题目:
Marsha and Bill own a collection of marbles. They want to split the collection among themselves so that both receive an equal share of the marbles. This would be easy if all the marbles had the same value, because then they could just split the collection in half. But unfortunately, some of the marbles are larger, or more beautiful than others. So, Marsha and Bill start by assigning a value, a natural number between one and six, to each marble. Now they want to divide the marbles so that each of them gets the same total value.
Unfortunately, they realize that it might be impossible to divide the marbles in this way (even if the total value of all marbles is even). For example, if there are one marble of value 1, one of value 3 and two of value 4, then they cannot be split into sets of equal value. So, they ask you to write a program that checks whether there is a fair partition of the marbles.
Input
Each line in the input describes one collection of marbles to be divided. The lines consist of six non-negative integers n1, n2, …, n6, where ni is the number of marbles of value i. So, the example from above would be described by the input-line
Output
For each colletcion, output
Output a blank line after each test case.
Sample Input
1 0 1 2 0 0
1 0 0 0 1 1
0 0 0 0 0 0
Sample Output
Collection #1:
Can’t be divided.
Collection #2:
Can be divided.
Code:
Marsha and Bill own a collection of marbles. They want to split the collection among themselves so that both receive an equal share of the marbles. This would be easy if all the marbles had the same value, because then they could just split the collection in half. But unfortunately, some of the marbles are larger, or more beautiful than others. So, Marsha and Bill start by assigning a value, a natural number between one and six, to each marble. Now they want to divide the marbles so that each of them gets the same total value.
Unfortunately, they realize that it might be impossible to divide the marbles in this way (even if the total value of all marbles is even). For example, if there are one marble of value 1, one of value 3 and two of value 4, then they cannot be split into sets of equal value. So, they ask you to write a program that checks whether there is a fair partition of the marbles.
Input
Each line in the input describes one collection of marbles to be divided. The lines consist of six non-negative integers n1, n2, …, n6, where ni is the number of marbles of value i. So, the example from above would be described by the input-line
1 0 1 2 0 0''. The maximum total number of marbles will be 20000. The last line of the input file will be0 0 0 0 0 0”; do not process this line.
Output
For each colletcion, output
Collection #k:'', where k is the number of the test case, and then either“Can be divided.” or “Can’t be divided.”.
Output a blank line after each test case.
Sample Input
1 0 1 2 0 0
1 0 0 0 1 1
0 0 0 0 0 0
Sample Output
Collection #1:
Can’t be divided.
Collection #2:
Can be divided.
Code:
#include<bits/stdc++.h> using namespace std; #define M(a, b) memset(a, b, sizeof(a)) int dp[100000], maxn; void ZeroOnePack(int cost, int weight){ for (int i = maxn; i >= cost; --i) dp[i] = max(dp[i-cost]+weight, dp[i]); } void CompletePack(int cost, int weight){ for (int i = cost; i <= maxn; ++i) dp[i] = max(dp[i-cost]+weight, dp[i]); } void MultiplePack(int cost, int weight, int amount){ if (cost*amount >= maxn) CompletePack(cost, weight); else{ for (int i = 1; i <= amount; amount-=i, i <<= 1) ZeroOnePack(i*cost, i*weight); ZeroOnePack(amount*cost, amount*weight); } } int main() { int cnt[7], kase = 0; while(++kase){ if(kase > 1) cout<<endl; M(dp, 0); maxn = 0; bool key = 1; for (int i = 1; i <= 6; ++i){ cin>>cnt[i]; maxn += cnt[i]*i; if (cnt[i]) key = 0; } if (key) break; bool flag = 0; if (maxn % 2 == 0){ maxn /= 2; for (int i = 1; i <= 6; ++i) MultiplePack(i, i, cnt[i]); if (dp[maxn] == maxn) flag = true; } cout<<"Collection #"<<kase<<":"<<endl; if (flag) cout<<"Can be divided."<<endl; else cout<<"Can't be divided."<<endl; } return 0; }
相关文章推荐
- hdu 1059 Dividing 多重背包
- Hdu 1059 Dividing & Zoj 1149 & poj 1014 Dividing(多重背包)
- hdu 1059 Dividing(多重背包)
- hdu 1059 Dividing ——多重背包复习
- HDU 1059 Dividing【多重背包】
- HDU 1059 Dividing(多重背包)
- HDU-1059 Dividing (多重背包 二进制优化+剪枝)
- HDU-1059 Dividing(多重背包)
- hdu 1059 Dividing 多重背包
- HDU 1059 Dividing(多重背包 , 二进制优化形成01背包)
- Hdu 1059 Dividing (多重背包)
- DP(完全背包二进制优化) Problem T:Dividing(HDU 1059)
- poj1014 hdu1059 Dividing 多重背包
- HDU 1059 Dividing (多重背包模板题,条件改变,比较灵活)
- hdu1059 Dividing(多重背包二进制优化)
- hdu1059 Dividing(多重背包+二进制优化)
- HDU 1059 Dividing 多重背包
- hdu 1059 Dividing DP,多重背包 测试数据很水
- 动态规划:HDU1059-Dividing(多重背包问题的二进制优化)
- HDU 1059 Dividing(多重背包)