#include <bits/stdc++.h>
#include "soccer.h"
#define ll long long
#define ld long double
#define pb push_back
#define fi first
#define se second
#define en '\n'
#define sp ' '
#define tb '\t'
#define ri(n) int n; cin >> n
#define rl(n) ll n; cin >> n
#define rs(s) string s; cin >> s
#define rc(c) char c; cin >> c
#define rv(v) for (auto &x : v) cin >> x
#define pven(v) for (auto x : v) cout << x << en
#define pv(v) for (auto x : v) cout << x << sp; cout << en
#define all(v) v.begin(), v.end()
#define rall(v) v.rbegin(), v.rend()
#define yes cout << "YES" << en
#define no cout << "NO" << en
#define smin(a, b) a = min(a, b)
#define smax(a, b) a = max(a, b)
#define ssort(a, b) if (a < b) swap(a, b)
#define bitcnt(a) (__builtin_popcountll(a))
#define bithigh(a) (63-__builtin_clzll(a))
#define lg bithigh
#define highpow(a) (1LL << (ll)lg(a))
using namespace std;
const ll LINF = 2e18;
const int mxN = 300, INF = 2e9;
bool Check(int N, vector<vector<int> > F){
for (int i = 0; i < N; i++){
bool f = 0;
for (int j = 0; j < N; j++){
if (!F[i][j]){
if (f) return 0;
while (j+1 < N && !F[i][j+1])
j++;
f = 1;
}
}
}
return 1;
}
int biggest_stadium(int N, vector<vector<int>> F){
if (!Check(N, F)) return 0;
vector<vector<int> > G(N, vector<int>(N));
int cnt = 0;
for (int i = 0; i < N; i++){
for (int j = 0; j < N; j++){
G[i][j] = F[j][i];
cnt += F[j][i];
}
}
if (!Check(N, G)) return 0;
return N*N - cnt;
}
