# include <bits/stdc++.h>
# define speed ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0)
// # define int long long
# define fi first
# define se second
using namespace std;
const int N = 1e5 + 7;
const int mod = 1e9 + 7;
// const int INF = 1e18;
int x[N], g[N], d[N];
int32_t main() {
speed;
int n;
cin >> n;
for ( int i = 1; i <= n; i++ ) {
cin >> x[i] >> g[i] >> d[i];
d[i] += d[i - 1];
}
int mx = 0, sum = 0, l = 1, r = 0;
for ( int i = 1; i <= n; i++ ) {
r = i;
sum += g[i];
while ( l < r && x[i] - x[l] > d[i] - d[l - 1] ) {
sum -= g[l];
l++;
}
mx = max( mx, sum );
}
cout << mx;
}
