poj3642 01背包

http://poj.org/problem?id=3624

#include<iostream>
#include<cstdio>
#include<algorithm>
#include<cstring>
#include<cmath>
using namespace std;

int z[3405],v[3405];
int dp[12885];

int main()
{
    int N,M;
    while(cin>>N>>M)
    {
        memset(dp,0,sizeof(dp));
        for(int i=1; i<=N; i++)
            cin>>z[i]>>v[i];
        for(int i=1; i<=N; i++)
            for(int j=M; j>=z[i]; j--)
                dp[j]=max(dp[j],dp[j-z[i]]+v[i]);
        cout<<dp[M]<<endl;
    }
    return 0;
}