#include <fstream>
using namespace std;

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

int n,g,w,p,D[10010],i,j;

int main()
{
    fin>>n>>g;
    for( i = 1 ; i <= n ; i++ )
    {
        fin>>w>>p;
        for( j = g - w ; j >= 0 ; j-- )
        {
            if( D[ j + w ] < D[ j ] + p )
                D[ j + w ] = D[ j ] + p;
        }
    }

    fout<<D[g];

return 0;
}