#include <bits/stdc++.h>
using namespace std;
ifstream fin("rucsac.in");
ofstream fout("rucsac.out");

const int NMAX = 5005, GMAX = 10005;
int w[NMAX], p[NMAX], dp[GMAX];
int32_t main()
{
    int n, g;
    fin >> n >> g;
    for(int i = 1; i <= n; i++)
        fin >> w[i] >> p[i];
    for(int i = 1; i <= n; i++)
    {
        for(int j = g; j >= w[i]; j--)
            dp[j] = max(dp[j], dp[j-w[i]] + p[i]);
    }
    fout << dp[g] << "\n";

    fin.close();
    fout.close();
    return 0;
}