#include <fstream>
using namespace std;
ifstream f("rucsac.in");
ofstream g("rucsac.out");
int n,G,p,j,i,q,a[100][100];
int main()
{
    f>>n>>G;
    for(i=1;i<=n;i++)
       {f>>q>>p;
        for(j=1;j<q;j++) {a[i][j]=a[i-1][j];}
        for(j=q;j<=G;j++) {a[i][j]=max(a[i-1][j],a[i-1][j-q]+p);}
       }
       g<<a[n][G];
       return 0;
}