#include <fstream>
using namespace std;

ifstream cin("rucsac.in");
ofstream cout("rucsac.out");

int n, G;

int dp[10005];

int main()
{
    cin>>n>>G;
    for (int i = 1; i<=n; ++i)
    {
        int w, p;
        cin>>w>>p;

        for (int j = G; j >= w; --j)
            dp[j] = max(dp[j], dp[j - w] + p);
    }
    int maxim = 0;
    for (int i = 0; i<=G; ++i)
        maxim = max(maxim, dp[i]);
    cout<<maxim;
}