#include <iostream>
#include <fstream>
std::ifstream fin("rucsac.in");
std::ofstream fout("rucsac.out");
#define MOD 1000000007
int dp[5001][5001];
int w[5001];
int p[5001];
int main()
{
    int n, g;
    fin >> n >> g;
    for(int i = 1; i <= n; i++)
    {
        fin >> w[i] >> p[i];// weight , power        
    }
    
    for(int i = 1; i <=n ;i++)
    {
        for(int curg = 0; curg <= g; curg++)
        {
            //luam rpirma data suma anteriaora    
            dp[i][curg] = dp[i - 1][curg];
            //verif daca nu am intrecut limita de greutate
            if(w[i] <= curg)
            {
                dp[i][curg] = std::max(dp[i][curg], dp[i - 1][curg - w[i]] + p[i]);
            }
        }
    }    
    fout << dp[n][g];
    return 0;
}