#include <bits/stdc++.h>
using namespace std;

const int MAX = 10000;
int w[MAX], p[MAX], dp[MAX];

int main()
{
    ifstream cin("rucsac.in");
    ofstream cout("rucsac.out");
    int n, G;
    cin >> n >> G;

    for (int i = 1; i <= n; ++i)
        cin >> 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]);
        }
    }

    cout << dp[G];

    return 0;
}