#include <fstream>
using namespace std;
ifstream cin("rucsac.in");
ofstream cout("rucsac.out");
int n,gmax,a[10001][10001];
int main()
{
    cin>>n>>gmax;
    for (int i =1;i<=n;i++)
    {
        int p,w;
        cin>>w>>p;
        for (int j=1;j<=gmax;j++)
        {
            if (j>=w)
                a[i][j]=max(p+a[i-1][j-w],a[i-1][j]);
            else
                a[i][j]=a[i-1][j];
        }
    }
    cout<<a[n][gmax];
    return 0;
}