#include<bits/stdc++.h>
using namespace std;
#define all(a) a.begin(),a.end()
#define ll long long
#define pb push_back
#define nl '\n'
#define popb pop_back()
#define sz size()
#define ld long double
#define ull unsigned long long
#define F first
#define S second
#define fix fixed<<setprecision
#define pii pair<int,int>
#define E exit (0)
#define int1 long long
const int inf=1e9;
int n,x[100001],g[100001],d[100001];
pair<pii,pii> dq(int l,int r,int z=0) {
if (l==r) {
return {{g[l],d[l]},{x[l],x[l]}};
}
int mid=(l+r)/2;
pair<pii,pii> a=dq(l,mid,1),b=dq(mid+1,r,2);
if (b.S.S-a.S.F<=a.F.S+b.F.S) {
return {{a.F.F+b.F.F,a.F.S+b.F.S},{a.S.F,b.S.S}};
}
if (z==2) {
return a;
}
return b;
}
int main() {
//freopen("planting.in","r",stdin);
//freopen("planting.out","w",stdout);
ios_base::sync_with_stdio(false);
cin.tie(NULL);
cin>>n;
for (int i=1;i<=n;i++) {
cin>>x[i]>>g[i]>>d[i];
}
cout<<dq(1,n).F.F;
}
