#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
#include "debug.h"
#else
#define dbg(...) 47
#endif
#define int long long
signed main() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
int n;
cin >> n;
vector<int> x(n), g(n), d(n);
for (int i = 0; i < n; i++) {
cin >> x[i] >> g[i] >> d[i];
}
vector<int> p(n + 1), k(n + 1);
for (int i = 0; i < n; i++) {
p[i + 1] = p[i] + d[i];
k[i + 1] = k[i] + g[i];
}
int ans = 0;
for (int l = 0; l < n; l++) {
for (int r = l; r < n; r++) {
int e = p[r + 1] - p[l];
int g = k[r + 1] - k[l];
if (e >= x[r] - x[l]) {
ans = max(ans, g);
}
}
}
cout << ans << '\n';
return 0;
}
