C++ :

#include<cstdio>
#include<iostream>
using namespace std;
const int mm=13333;
int f[mm],w[mm],d[mm];
int i,j,k,n,m;
int main()
{
    //freopen("beibao0.in","r",stdin);
	//freopen("beibao0.out","w",stdout);
    while(scanf("%d%d",&n,&m)!=-1)
    {
        for(i=0;i<n;++i)scanf("%d%d",&w[i],&d[i]);
        for(i=0;i<m;++i)f[i]=0;
        for(i=0;i<n;++i)
            for(j=m;j>=w[i];--j)f[j]=max(f[j],f[j-w[i]]+d[i]);
        printf("%d\n",f[m]);
    }
    return 0;
}