#include <bits/stdc++.h>
using namespace std;
 
typedef long long ll;
typedef vector<int> vi;
typedef pair<int, int> pi;
#define pb push_back
#define mp make_pair
#define f first
#define s second

void solve(){
    int n, m;
    cin >> n >> m;
    vi dp(m+1);
    for(int i = 0; i < n; i++){
        int w, p;
        cin >> w >> p;
        for(int j = m; j >= 0; j--){
            if(j - w < 0)
                continue;
            dp[j] = max(dp[j], dp[j-w] + p);
        }
    }
    cout << *max_element(dp.begin(), dp.end()) << '\n';
}  
 
int main(){
    freopen("rucsac.in", "r", stdin);
    freopen("rucsac.out", "w", stdout);
    ios::sync_with_stdio(0); cin.tie(0);
    int t = 1;
    //cin >> t;
    while(t--){
        solve();
    }
}