#include <bits/stdc++.h>
#define ar array
#define all(x) x.begin(), x.end()
using namespace std;
typedef long long ll;
const int N = 2e5;
ar <int, 2> a[3][N];
int b[3][N];
int main() {
ios::sync_with_stdio(false);
cin.tie(0); cout.tie(0);
int n;
cin >> n;
vector <ar <int, 2>> x(n), y(n), z(n);
for (int i = 0; i < n; i++) {
for (int j = 0; j < 3; j++) {
cin >> a[j][i][0];
a[j][i][1] = i;
b[j][i] = a[j][i][0];
}
}
for (int i = 0; i < 3; i++)
sort(a[i], a[i] + n, greater <ar <int, 2>>());
vector <int> p(3, 0);
int nok = 1;
while (max(p[0], max(p[1], p[2])) < n && nok) {
nok = 0;
for (int i = 0; i < 3; i++) {
for (int j = 0; j < 3; j++) {
if (i != j) {
if (b[j][a[i][p[i]][1]] >= a[j][p[j]][0]) {
nok = 1;
p[i]++;
break;
}
}
}
}
}
int ans = 0;
for (int i = 0; i < 3; i++) {
if (p[i] == n)
return cout << -1, 0;
ans += a[i][p[i]][0];
}
cout << ans << '\n';
}
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