#include<bits/stdc++.h>
#define int long long
#define db double
#define pb push_back
#define pii pair<int,int>
#define fi first
#define se second
#define loop(i,j,k) for(int i=j;i<k;i++)
using namespace std;
signed main(){
//ios_base::sync_with_stdio(false);cin.tie(0);
int n;
cin>>n;
int ans=0;
vector<int> x,g,p;
x.pb(0);
g.pb(0);
p.pb(0);
for(int i=0;i<n;i++){
int a,b,c;
cin>>a>>b>>c;
x.pb(a);
g.pb(g[i]+b);
p.pb(p[i]+c);
}
vector<pii> diff;
ans=g[n]-g[n-1];
diff.pb({x[n]-p[n],g[n]});
for(int i=n-1;i>0;i--){
if(x[i]-p[i]<diff.back().fi) diff.pb({x[i]-p[i],g[i]});
int con=x[i]-p[i-1];
int l=0,r=diff.size()-1;
while(l<r){
int mid=(l+r)/2;
if(diff[mid].fi>con) l=mid+1;
else r=mid;
}
if(diff[l].fi<=con) ans=max(ans,diff[l].se-g[i-1]);
else ans=max(ans,g[i]-g[i-1]);
}
cout<<ans;
return 0;
}
