HDU 3732 Ahui Writes Word

Posted 2020-08-15 勿忘初心0924

Ahui Writes Word

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)
Total Submission(s): 2856    Accepted Submission(s): 1018

Problem Description

We all know that English is very important, so Ahui strive for this in order to learn more English words. To know that word has its value and complexity of writing (the length of each word does not exceed 10 by only lowercase letters), Ahui wrote the complexity of the total is less than or equal to C.
Question: the maximum value Ahui can get.
Note: input words will not be the same.

 

 

Input

The first line of each test case are two integer N , C, representing the number of Ahui’s words and the total complexity of written words. (1 ≤ N ≤ 100000, 1 ≤ C ≤ 10000)
Each of the next N line are a string and two integer, representing the word, the value(Vi ) and the complexity(Ci ). (0 ≤ Vi , Ci ≤ 10)

 

 

Output

Output the maximum value in a single line for each test case.

 

 

Sample Input

5 20 go 5 8 think 3 7 big 7 4 read 2 6 write 3 5

 

 

Sample Output

15

Hint

Input data is huge,please use “scanf(“%s”,s)”

 

 

Author

Ahui

 

 

Source

ACMDIY第二届群赛

 

 

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/*
二进制优化的时候，转化成完全背包就错，注释掉就对。神奇
*/
#include<bits/stdc++.h>
#define N 10005
#define M 11000
using namespace std;
int dp[M];

void ZeroOne_Pack(int cost,int weight,int n)
{
    for(int i=n;i>=cost;i--)
        dp[i]=max(dp[i],dp[i-cost]+weight);
}

void Complete_Pack(int cost,int weight,int n)
{
    for(int i=cost;i<=n;i++)
        dp[i]=max(dp[i],dp[i-cost]+weight);
}

int Multi_Pack(int c[],int w[],int num[],int n,int m)
{
    memset(dp,0,sizeof (dp));
    for(int i=1;i<=n;i++)
    {
        // if(w[i]*num[i]>m)
        // {
            // Complete_Pack(c[i],w[i],m);
        // }    
        // else
        // {
            //cout<<i<<endl;
            int k=1;
            while(k<num[i])//进行二进制拆分
            {
                ZeroOne_Pack(c[i]*k,w[i]*k,m);
                num[i]-=k;
                k<<=1;
            }
            ZeroOne_Pack(c[i]*num[i],w[i]*num[i],m);
        // }
    }
    return dp[m];
}
char op[20];
int main()
{
    //freopen("C:\\Users\\acer\\Desktop\\in.txt","r",stdin);
    int n,m;
    int val,weight;
    int num[15][15];
    while(scanf("%d%d",&n,&m)!=EOF)
    {
        memset(num,0,sizeof num);
        for(int i=1;i<=n;i++)
        {
            scanf("%s%d%d",op,&weight,&val);
            num[weight][val]++;
        }    
        int Num[N],V[N],W[N];
        memset(V,0,sizeof V);
        memset(W,0,sizeof W);
        memset(Num,0,sizeof Num);
        int len=0;
        for(int i=0;i<=10;i++)
            for(int j=0;j<=10;j++)
            {
                if(num[i][j]>0)
                {
                    //cout<<num[i][j]<<endl;
                    len++;
                    Num[len]=num[i][j];
                    V[len]=j;
                    W[len]=i;
                    //cout<<W[len]<<" "<<V[len]<<endl;
                }
            }
        //cout<<len<<endl;
        printf("%d\n",Multi_Pack(V,W,Num,len,m));
        // for(int i=0;i<=m;i++)
            // cout<<dp[i]<<" ";
        // cout<<endl;
    }
    return 0;
}