#include <iostream>
#include <fstream>
using namespace std;

ifstream fin("rucsac.in");
ofstream fout("rucsac.out");

struct obj
{
    int weight;
    int profit;
};

int dp[10005];
obj v[5005];


int main()
{
    int n, g;
    fin >> n >> g;

    for (int i = 0; i < n; i++)
    {
        fin >> v[i].weight;
        fin >> v[i].profit;
    }


    for (int i = 0; i < n; i++)
    {
        for (int j = g; j >= v[i].weight; j--)
        {
            dp[j] = max(dp[j], dp[j - v[i].weight] + v[i].profit);
        }
    }
    fout << dp[g];
    return 0;
}