#include <bits/stdc++.h>

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

int v[10005];
int main()
{
    int n, g;
    fin >> n >> g;
    vector <int> w(n+5);
    vector <int> p(n+5);
    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--)
        {
            v[j] = max(v[j], v[j-w[i]] + p[i]);
        }
    }
    fout << v[g];
    return 0;
}