#include <fstream>

using namespace std;

ifstream cin("rucsac.in");
ofstream cout("rucsac.out");

int main() {
    int n, gmax;
    cin >> n >> gmax;

    int weights[n];
    int values[n];

    for (int i = 0; i < n; i++) {
        cin >> weights[i] >> values[i];
    }

    int dp[gmax + 1];
    for (int i = 0; i <= gmax; i++) {
        dp[i] = 0;
    }

    for (int i = 0; i < n; i++) {
        for (int j = gmax; j >= weights[i]; j--) {
            dp[j] = max(dp[j], dp[j - weights[i]] + values[i]);
        }
    }

    cout << dp[gmax] << endl;

    return 0;
}