#include <bits/stdc++.h>
using namespace std;
using ll = long long;
int main() {
ios_base::sync_with_stdio(0); cin.tie(0);
ll n;
cin >> n;
vector<ll> x(n), g(n), d(n);
for (ll i = 0; i < n; ++i)
cin >> x[i] >> g[i] >> d[i];
ll j = -1, ans = 0, totalEnergy = 0, totalGold = 0;
for (ll i = 0; i < n; ++i) {
if (i != 0) {
totalEnergy -= d[i - 1];
totalGold -= g[i - 1];
}
while (j + 1 < n && totalEnergy + d[j + 1] >= x[j + 1] - x[i]) {
++j;
totalEnergy += d[j];
totalGold += g[j];
}
ans = max(ans, totalGold);
}
cout << ans << '\n';
return 0;
}
