#include <iostream>
#include <fstream>

using namespace std;

ifstream f("rucsac.in");
ofstream g("rucsac.out");
const int GMAX = 10001, NMAX = 5000;
struct object
{
    int weight, profit;
};
int maxProfit[GMAX];
int main()
{
    int n, ans = 0, wMax;
    f>>n>>wMax;

    for(int i=1; i<=n;i++)
    {
        object obj;
        f>>obj.weight>>obj.profit;
        for(int w = wMax; w >= obj.weight; w--)
        {
            maxProfit[w] = max(maxProfit[w], maxProfit[w - obj.weight] + obj.profit);
            ans = max(ans, maxProfit[w]);
        }
    }
    g<<ans;
}