#include <fstream>
#include <vector>

using namespace std;

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

    int n, g;
    fin >> n >> g;

    vector<int> w(n + 1);
    vector<int> p(n + 1);
    for (int i = 1; i <= n; i++) {
        fin >> w[i] >> p[i];
    }

    vector<int> dp(g + 1, 0);
    for (int i = 1; i <= n; i++) {
        for (int j = g; j >= 0; j--) {
            if (j - w[i] < 0) continue;
            dp[j] = max(dp[j], dp[j - w[i]] + p[i]);
        }
    }

    fout << dp[g];

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