#include <bits/stdc++.h>
#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
//#define int long long
using namespace std;
using ll = long long;
using ull = unsigned long long;
using ld = long double;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
const int mod = 1e9 + 7;
const int LOG = 20;
const int maxn = 1e5 + 5;
const double eps = 1e-9;
int32_t main() {
ios_base::sync_with_stdio(false);
cout.tie(0); cin.tie(0);
int n;
cin >> n;
vector<array<int, 3> > v(n+1);
for(int i=1; i<=n; i++) cin >> v[i][0] >> v[i][1] >> v[i][2];
ll pref[n+1][3];
memset(pref, 0, sizeof(pref));
for(int i=1; i<=n; i++)
for(int j=1; j<3; j++) pref[i][j] = pref[i-1][j] + v[i][j];
ll ans = 0;
for(int i=1; i<=n; i++) {
for(int j=i; j<=n; j++)
if(pref[j][2] - pref[i-1][2] >= v[j][0] - v[i][0] + 1) ans = max(ans, pref[j][1] - pref[i-1][1]);
}
cout << ans << '\n';
return 0;
}
