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#include <iostream>
#include <fstream>
using namespace std;
#define MXN 5001
#define MXG 5001
ifstream fin("rucsac.in");
ofstream fout("rucsac.out");
int v[MXN];
int n,g;
int w[MXN],p[MXN];
int maxx(int i, int j)
{
if(i>j)
{
return i;
}
return j;
}
int rucsac()
{
int i,j;
for(i=1;i<=n;i++)
{
for(j=g;j>=w[i];j--)
{
v[j]=maxx(v[j],v[j-w[i]]+p[i]);
}
}
return v[g];
}
int main()
{
int i;
fin>>n>>g;
for(i=1;i<=n;i++)
{
fin>>w[i]>>p[i];
}
fout<<rucsac();
fin.close();
fout.close();
return 0;
}