#include <fstream>

using namespace std;

ifstream in("rucsac.in");
ofstream out("rucsac.out");
int w[5002], p[5002], optim[10002], n, g, i, j;

int main()
{
    in >> n >> g;
    for(i = 1; i <= n; i++) in >> w[i] >> p[i];
    optim[0] = 0;

    for(i = 1; i <= n; i++) {
        for(j = g; j >= w[i]; j--) {
            optim[j] = max(optim[j], optim[j-w[i]]+p[i]);
        }
    }
    out << optim[g];

    in.close(), out.close();
    return 0;
}