#include <iostream>
#include <fstream>

using namespace std;

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

int n, g;

struct obj{
    int greutate;
    int profit;
}a[5005];

int dp[5005];

int main()
{
    f>>n>>g;
    for(int i=1; i<=n; i++)
    {
        f>>a[i].greutate>>a[i].profit;
        for(int j=g; j>=a[i].greutate; j--)
            dp[j]=max(dp[j], dp[j-a[i].greutate]+a[i].profit);
    }
    fout<<dp[g];
    return 0;
}