#include <bits/stdc++.h>
#define int long long
#define pii pair<int, int>
#define all(v) v.begin(), v.end()
using namespace std;
const int oo = 1e18 + 9;
const int MAX = 4e5 + 5, LOGMAX = 20, B = 441, MOD = 1e9 + 7;
int n;
array<int, 3> arr[MAX];
int ans = 0;
void dc(int l, int r){
if(l == r) {ans = max(ans, arr[l][1]);return;}
int mid = (l + r) / 2;
vector<pii> v;
for(int i = mid + 1, e = arr[i][2], g = arr[i][1]; i <= r; i++, e += arr[i][2], g += arr[i][1]) v.push_back({-(arr[i][0] - arr[mid][0]) + e, g});
sort(all(v));
for(int i = v.size() - 2; i >= 0; i--) v[i].second = max(v[i].second, v[i + 1].second);
for(int i = mid, e = arr[i][2], g = arr[i][1]; i >= l; i--, e += arr[i][2], g += arr[i][1]){
auto itr = lower_bound(all(v), make_pair(-(e - (arr[mid][0] - arr[i][0])), -oo));
if(itr != v.end()) ans = max(ans, itr->second + g);
}
dc(l, mid), dc(mid + 1, r);
}
void solve(){
cin >> n;
for(int i = 1; i <= n; i++){
cin >> arr[i][0] >> arr[i][1] >> arr[i][2];
}
dc(1, n);
cout << ans << '\n';
}
signed main(){
ios::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
int t = 1;
// cin >> t;
while(t--) solve();
}
