#include <bits/stdc++.h>
using namespace std;
int main()
{
	int n, m;
	cin >> n >> m;
	int mins = min(n, m);
	int cha = abs(n - m);
	int ans = mins + (cha + 1) / 2;
	cout << ans << endl;
	if (n >= m)
	{
		for (int i = 1; i <= n; i++)
		{
			if (i <= mins)
			{
				for (int j = 1; j <= m; j++)
				{
					if (i == j) cout << 1 << " ";
					else cout << 0<<" ";
				}
				cout << endl;
			}
			else//退出对角线
			{
				if (i == n && (i - mins) & 1)
				{
					for (int j = 1; j <= m; j++)
					{
						if (j == 1) cout << 1 << " ";
						else cout << 0 << " ";
					}
					break;
				}
				for (int j = 1; j <= m; j++)
				{
					if ((i - mins) % 2 == 0 && j == 1) cout << 1 << " ";
					else cout << 0 << " ";
				}
				cout << endl;
			}
		}
	}
	else
	{
		for (int i = 1; i < n; i++)
		{
			for (int j = 1; j <= m; j++)
			{
				if (j <= mins && i == j) cout << 1 << " ";
				else cout << 0 << " ";
			}
			cout << endl;
		}
		for (int j = 1; j <= m; j++)
		{
			if (j == m && (j - mins) & 1)
			{
				cout << 1 << " ";
				continue;
			}
			if (j <= mins)
			{
				if (j == mins) cout << 1 << " ";
				else cout << 0 << " ";
			}
			else
			{
				if ((j - mins) % 2 == 0) cout << 1 << " ";
				else cout << 0 << " ";
			}
		}
	}
	return 0;
}