#include <bits/stdc++.h>
#define pb push_back
#define endl "\n"
#define mp make_pair
#define fi first
#define se second
#define all(x) x.begin(), x.end()
#define fname ""
#define sz(x) (int)(x.size())
typedef long long ll;
using namespace std;
const ll N = (ll)(5e5) + 322;
const ll INF = (ll)(1e9);
const ll mod = (ll)(1e9) + 7;
const double eps = 1e-9;
ll n, x[N], g[N], e[N], mx, gsum;
int main () {
//ios_base :: sync_with_stdio (false); cin.tie(0);
//freopen(fname".in", "r", stdin);
//freopen(fname".out", "w", stdout);
scanf("%lld", &n);
for (int i = 1; i <= n; ++i) {
scanf("%lld%lld%lld", &x[i], &g[i], &e[i]);
}
for (int i = 1; i <= n; ++i) {
ll sum = 0, gsum = 0;
for (int j = i; j <= n; ++j) {
sum += e[j];
gsum += g[j];
if (sum >= (x[j] - x[i])) {
mx = max(mx, gsum);
}
}
}
cout << mx;
return 0;
}
