#include <iostream>
#include <bits/stdc++.h>
using namespace std;
ifstream fin("rucsac.in");
ofstream fout("rucsac.out");
int n,maxw,dp[10005];
struct obiect
{
   int weight,profit;
}wp;
int main()
{
    fin>>n>>maxw;
    for(int i=1;i<=n;i++)
    {
        fin>>wp.weight>>wp.profit;
        for(int j=maxw;j>=wp.weight;j--)
            dp[j]=max((dp[j-wp.weight]+wp.profit),dp[j]);
    }
    fout<<dp[maxw];
    return 0;
}