#include <iostream>
#include <fstream>
using namespace std;

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

int dp[10010];
int main()
{
    int n, g;
    fin>>n>>g;

    for(int i = 1; i <= n; i++){
        int w, p;
        fin>>w>>p;
        for(int j = g; j >= w; j--){
            dp[j] = max(dp[j], dp[j-w] + p);
        }
    }

    fout<<dp[g];
    return 0;
}