This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
using namespace std;
int main() {
cin.tie(0)->sync_with_stdio(0);
int n, m; cin >> n >> m;
vector<int> adj[n];
while(m--){
int u, v; cin >> u >> v;
adj[u].push_back(v);
adj[v].push_back(u);
}
cout << n << '\n';
for(int i = 0; i < n; i++){
for(int j = 0; j < n; j++){
if(i & 1) cout << (((j + 1) % 4) < 2) << ' ';
else cout << ((j % 4) < 2) << '\n';
}
cout << '\n';
}
}
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