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 <iostream>
using namespace std;
signed main() {
	ios::sync_with_stdio(0);
	cin.tie(0); cout.tie(0);
	int n;
	cin >> n;
	cout << 2 * n;
	for (int i = 1; i < n; i++) {
		cout << '\n';
		for (int j = 0; j < n; j++) {
			if (i == j) cout << "0 ";
			else cout << j << ' ';
		}
	}
	for (int i = 1; i < n; i++) {
		cout << '\n';
		for (int j = 0; j < n; j++) {
			if (i == j) cout << "0 ";
			else cout << j << ' ';
		}
	}
	return 0;
}
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