//
//  main.cpp
//  Problema rucsacului
//
//  Created by Albastroiu Radu on 9/4/16.
//  Copyright © 2016 Albastroiu Radu. All rights reserved.
//

#include <iostream>
#include <fstream>
using namespace std;

ifstream fin("rucsac.in");
ofstream fout("rucsac.out");

int nr_elemente, greutate, cost_i, profit_i, i, j, suma_maxima[10001], profit_maxim;

int main()
{
    
    fin>>nr_elemente>>greutate;
    
    for(i=1;i<=nr_elemente;i++)
    {
        fin>>cost_i>>profit_i;
        
        for(j=greutate;j>=cost_i;j--)
        {
            suma_maxima[j] = max(suma_maxima[j], suma_maxima[j-cost_i]+profit_i);
            profit_maxim = max(profit_maxim, suma_maxima[j]);
        }
        
    }
    
    fout<< profit_maxim;

    return 0;
}