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

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

int n, g;

int dp[100005];

signed main()
{
    in >> n >> g;
    for(int i = 1; i <= n; i++)
    {
        int gr, pret;
        in >> gr >> pret;
        for(int j = g; j >= gr; j--)
        dp[j] = max(dp[j], pret + dp[j - gr]);
    }
    int maxim = 0;
    for(int i = 1; i <= g; i++)
    {
        maxim = max(maxim, dp[i]);
    }
    out << maxim;
    return 0;
}