#include <fstream>
using namespace std;
ifstream f("rucsac.in");
ofstream g("rucsac.out");
int n,G,p,j,i,q,a[5001][10001];
int main()
{
    f>>n>>G;
    for(i=1;i<=n;i++)
       {f>>q>>p;
        if(q<=Q)
        {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);}}
        else for(j=1;j<=Q;j++) a[i][j]=a[i-1][j];
       }
       g<<a[n][G];
       return 0;
}