#include <iostream>
#include <fstream>
#include <vector>

std::ifstream in("rucsac.in");
std::ofstream out("rucsac.out");

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

    std::vector<int> dp(g + 1);

    std::vector<std::pair<int, int>> v(n + 1);
    for (int i = 1; i <= n; i++) {
        int w, p;
        in >> w >> p;
        v[i] = {w, p};
    }

    for (int i = 1; i <= n; i++)
        for (int j = g; j >= 0; j--) {
            //take
            if (j - v[i].first >= 0)
                dp[j] = std::max(dp[j], dp[j - v[i].first] + v[i].second);
        }
    
    out << dp[g] << '\n';
}