//scrie parcugere inversa
#include <iostream>
#include <fstream>

using namespace std;

int n, g, crt[10500];

int main()
{
    int w,p;
    ifstream fin ("rucsac.in");
    ofstream fout ("rucsac.out");
    fin>>n>>g;
    for (int i=1;i<=n;i++)
    {
        fin>>w>>p;
        for (int j=g;j>=w;j--)
        {
            if (p+crt[j-w]>crt[j])
                crt[j]=p+crt[j-w];
        }
    }
    fout<<crt[g];
    return 0;
}