#include <fstream>
#include <iostream>
#define ll long long

using namespace std;
ifstream fin("rucsac.in");
ofstream fout("rucsac.out");
struct object
{
    ll w, p;
}v[105];
ll n,g;
ll dp[505][10005];

void din()
{
    for(int i=1;i<=n;i++)
        for(int j=1;j<=g;j++)
    {
        if(v[i].w<=j)
        dp[i][j]=max(dp[i-1][j],v[i].p+dp[i-1][j-v[i].w]);
    }
}

int main()
{
    fin>>n>>g;
    for(int i=1;i<=n;i++)
        fin>>v[i].w>>v[i].p;
    din();
    fout<<dp[n][g];
    return 0;
}