#include<bits/stdc++.h>
using namespace std;
ifstream fin("rucsac.in");
ofstream fout("rucsac.out");
int n, gmax, v[10005], profit, greutate;
int main()
{
	cin >> n >> gmax;
	for (int i = 1; i <= n; i++)
	{
		cin >> greutate >> profit;
		for (int j = gmax; j >= greutate; j--)
			if (v[j] < v[j - greutate] + profit)
				v[j] = v[j - greutate] + profit;
	}
	cout << v[gmax];
}