#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;
#define fi first
#define se second
#define mp make_pair
#define pb push_back
#define fbo find_by_order
#define ook order_of_key
typedef long long ll;
typedef pair<ll,ll> ii;
typedef vector<int> vi;
typedef long double ld;
typedef tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> pbds;
typedef set<int>::iterator sit;
typedef map<int,int>::iterator mit;
typedef vector<int>::iterator vit;
ll r[5001];
ll c[5001];
ll a[5001][5001];
int main()
{
ios_base::sync_with_stdio(0); cin.tie(0);
int n; cin >> n;
for(int i = 0; i < n; i++)
{
for(int j = 0; j < n; j++)
{
cin>>a[i][j];
r[i]+=a[i][j];
c[j]+=a[i][j];
}
}
ll best = -ll(1e18);
for(int i = 0; i < n; i++)
{
for(int j = 0; j < n; j++)
{
best = max(best, r[i]+c[j]-a[i][j]);
}
}
cout<<best<<'\n';
}
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