#include<bits/stdc++.h> //:3
using namespace std;
typedef long long LL;
#define all(a) (a).begin(), (a).end()
#define ff first
#define ss second
#define pb push_back
#define mp make_pair
#define pi pair<int, int>
#define sz(x) (int)((x).size())
#define int long long
#define cin in
#define cout out

const int dx[] = {0, 1, 0, -1};
const int dy[] = {1, 0, -1, 0};

const int inf = 2e9;
const LL mod = 1e9 + 7;
const int N = 2e6 + 11;
const LL INF64 = 3e18 + 1;
const double eps = 1e-14;
const double PI = acos(-1);

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

int n, p[N], w[N], dp[N], G;

//dp[i] - profitul avand greutatea i

void solve(){

    cin >> n >> G;

    for(int i = 1; i <= n; i++){
        cin >> w[i] >> p[i];
    }

    for(int i = 1; i <= G; i++){
        dp[i] = -inf;
    }

    int ans = 0;
    for(int i = 1; i <= n; i++){
        for(int j = G; j >= w[i]; j--){
            dp[j] = max(dp[j], dp[j - w[i]] + p[i]);
            ans = max(ans, dp[j]);
        }
    }

    cout << ans << '\n';
}

int32_t main(){
ios_base :: sync_with_stdio(0); cin.tie(0); cout.tie(0);

    //cout << setprecision(6) << fixed;

    int T = 1;
    //cin >> T;
    while(T--){
        solve();
    }
}