#include<bits/stdc++.h>
using namespace std;
using ll=long long;
#define rng(i,a,b) for(int i=(int)a;i<(int)b;i++)
#define rep(i,b) rng(i,0,b)
#define repn(i,b) rng(i,1,b+1)
#define pb push_back
#define eb emplace_back
#define all(x) x.begin(),x.end()
#define si(x) (int)(x.size())
#define mp make_pair
#define tct template<class t>
tct using vc=vector<t>;
using vi=vc<int>;
#define tctu template<class t,class u>
tctu bool chmax(t&a,u b){if(a<b){a=b;return true;}else return false;}
tctu bool chmin(t&a,u b){if(a>b){a=b;return true;}else return false;}
using P=pair<int,int>;
#define mp make_pair
#define a first
#define b second
using ld = long double;
constexpr int mod = 998244353;
void solve(){
int n;cin>>n;
vc<pair<P,int>>vec(n);
rep(i,n){
int x,y,w;cin>>x>>y>>w;
vec[i] = mp(mp(x, y), w);
}
sort(all(vec), [](auto&a, auto&b){
if(a.a.a != b.a.a) return a.a.a < b.a.a;
return a.a.b < b.a.b;
});
vc<pair<P,P>>dir;
rep(i,n){
rng(j,i+1,n){
if(vec[i].a.a == vec[j].a.a) continue;
dir.eb(mp(vec[j].a.a-vec[i].a.a, vec[j].a.b-vec[i].a.b), mp(i, j));
}
}
vc<int>p(n),ran(n);
rep(i,n) p[i] = ran[i] = i;
sort(all(dir), [](auto &a,auto &b){
ll f = (ll)a.a.a*b.a.b-(ll)a.a.b*b.a.a;
if(f) return f > 0;
//else return a.b < b.b;
});
int nn = 1;
while(nn <= n) nn <<= 1;
vc<ll>seg(2*nn), sum(2*nn), le(2*nn), ri(2*nn);
auto mrg=[&](int k){
sum[k] = sum[k*2+1]+sum[k*2+2];
le[k] = max(le[k*2+1], sum[k*2+1]+le[k*2+2]);
ri[k] = max(ri[k*2+2], sum[k*2+2]+ri[k*2+1]);
seg[k] = max(max(seg[k*2+1],seg[k*2+2]),le[k*2+2]+ri[k*2+1]);
};
auto upd=[&](int pos, int v){
pos += nn-1;
sum[pos] = v;
le[pos] = ri[pos] = seg[pos] = max(0, v);
while(pos){
pos = (pos-1)/2;
mrg(pos);
}
};
rep(i,n){
upd(i, vec[p[i]].b);
}
ll ans = seg[0];
rep(i,si(dir)){
int x = dir[i].b.a, y = dir[i].b.b;
if(ran[x] < ran[y]){
swap(p[ran[x]], p[ran[y]]);
swap(ran[x], ran[y]);
upd(ran[x], vec[p[ran[x]]].b);
upd(ran[y], vec[p[ran[y]]].b);
}
if(i+1 == si(dir) or (ll)dir[i].a.a*dir[i+1].a.b != (ll)dir[i].a.b*dir[i+1].a.a){
chmax(ans, seg[0]);
}
}
cout << ans << '\n';
}
signed main(){
cin.tie(0);
ios::sync_with_stdio(0);
cout<<fixed<<setprecision(20);
int t; t=1;//cin>>t;
while(t--) solve();
}
