#include <bits/stdc++.h>
using namespace std;

struct item {
    int w, p;
} v[5001];

int n, g;
int dp[5001][10001];

int main() {
    ifstream cin("rucsac.in");
    ofstream cout("rucsac.out");
    cin >> n >> g;
    for (int i = 1; i <= n; ++i) {
        cin >> v[i].w >> v[i].p;
    }
    for (int i = 1; i <= n; ++i) {
        for (int j = 1; j <= g; ++j) {
            dp[i][j] = dp[i - 1][j];
            if (j >= v[i].w) {
                 dp[i][j] = max(dp[i - 1][j], dp[i - 1][j - v[i].w] + v[i].p);
            }
        }
    }
    cout << dp[n][g] << " ";
}