#include <bits/stdc++.h>
#define ll long long
#define ff first
#define ss second
#define pii pair<int,int>
#define pll pair<ll,ll>
#define pb push_back
#define epb emplace_back
#define ull unsigned ll
using namespace std;
ll prefg[5001];
ll prefe[5001];
int main(){
ll n;
cin>>n;
vector<pair<ll,pair<ll,ll> > > v;
for(ll k=1;k<=n;k++){
ll x,y,z;
cin>>x>>y>>z;
v.push_back({x,{y,z}});
prefg[k]=prefg[k-1]+y;
prefe[k]=prefe[k-1]+z;
}
ll sz=v.size();
ll mx=0;
for(ll i1=0;i1<sz;i1++){
for(ll j1=i1;j1<sz;j1++){
ll i=i1+1;
ll j=j1+1;
ll len=v[j1].ff-v[i1].ff;
ll en=prefe[j]-prefe[i-1];
ll gol=prefg[j]-prefg[i-1];
if(en>=len){
mx=max(mx,gol);
}
}
}
cout<<mx;
return 0;
}
