#include <fstream>
#include <cstring>
using namespace std;
ifstream fin("rucsac.in");
ofstream fout("rucsac.out");
int n,G,w[5005],c[5005],dp[5005][10005];
int main()
{
    fin>>n>>G;
    for(int i=1;i<=n;i++)
    {
        fin>>w[i]>>c[i];
    }
    memset(dp, 0, sizeof(dp));
    for(int i=1;i<=n;i++)
        for(int k=0;k<=G;k++)
            if(k>=w[i])
                dp[i][k]=max(dp[i-1][k], dp[i-1][k-w[i]]+c[i]);
            else dp[i][k]=dp[i-1][k];
    fout<<dp[n][G];
    return 0;
}