#include <bits/stdc++.h>
using namespace std;
template<typename T>
void out(T x) { cout << x << endl; exit(0); }
#define watch(x) cout << (#x) << " is " << (x) << endl
using ll = long long;
const int maxn = 1e6 + 5;
int n;
ll x[maxn], g[maxn], d[maxn];
int main() {
ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
cin>>n;
for (int i=1; i<=n; i++) {
cin>>x[i]>>g[i]>>d[i];
g[i] += g[i-1];
d[i] += d[i-1];
}
ll ans = 0;
for (int i=1; i<=n; i++) {
for (int j=i; j<=n; j++) {
if (x[j]-x[i] <= d[j]-d[i-1]) {
ans = max(ans, g[j]-g[i-1]);
}
}
}
cout<<ans<<endl;
return 0;
}
