#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int N = 1e3 + 10, M = 4e5;
ll n, m, q;
struct node
{
	ll v, sex, f, id;
} e[N], e1[N];
bool cmp2(node a, node b)
{
	return a.v > b.v;
}
void solve1()
{
	int n, m;
	cin >> n >> m;

	cout << (n + m + 1) / 2 << endl;

	if (n <= m) {
		for (int i = 1; i <= n; i++) {
			for (int j = 1; j <= m; j++) {
				if (j <= i) {
					if (i == j) {
						cout << 1 << " ";
					} else {
						cout << 0 << ' ';
					}
				} else {
					if (i == n && ((j - n) % 2 == 0 || j == m)) {
						cout << 1 << " ";
					} else {
						cout << 0 << ' ';
					}
				}
			}
			cout << endl;
		}
	} else {
		for (int i = 1; i <= n; i++)
		{
			for (int j = 1; j <= m; j++)
			{
				if (i <= j)
				{
					if (i == j)
					{
						cout << 1 << " ";
					}
					else
					{
						cout << 0 << ' ';
					}
				}
				else
				{
					if (j == m && ((i - m) % 2 == 0 || i == n))
					{
						cout << 1 << " ";
					}
					else
					{
						cout << 0 << ' ';
					}
				}
			}
			cout << endl;
		}
	}
}
void solve()
{

	/*cin >> n >> m >> q;
	for (int i = 1; i <= n; i++)
	{
		cin >> e[i].v >> e[i].sex;
		e[i].id = i;
	}
	ll maxx = -1, f = -1;
	for (int i = 1; i <= n; i++)
	{
		e1[i].sex = e[i].sex;
		e1[i].v = e[i].v;
		e1[i].id = e[i].id;
		e1[i].f = 0;
		e[i].f = 0;
		if (e1[i].sex == 1)
		{
			maxx = max(maxx, e1[i].v);
			f = i;
		}
	}
	if (maxx == -1)
	{
		sort(e1 + 1, e1 + n + 1, cmp2);
		for (int i = 1; i <= m; i++)
		{
			e[e1[i].id].f = 1;
		}
	}
	else
	{
		e[f].f = 1;
		sort(e1 + 1, e1 + n + 1, cmp2);
		for (int i = 1; i <= m - 1; i++)
		{
			e[e1[i].id].f = 1;
		}
	}
	while (q--)
	{
		int op;
		cin >> op;

		if (op == 1)
		{

			int a, b;
			cin >> a >> b;
			e[a].sex = b;
			ll maxx = -1, f = -1;
			for (int i = 1; i <= n; i++)
			{
				e[i].f = 0;
				e1[i].sex = e[i].sex;
				e1[i].v = e[i].v;
				e1[i].id = e[i].id;
				e1[i].f = 0;
				if (e1[i].sex == 1)
				{
					maxx = max(maxx, e1[i].v);
					f = i;
				}
			}
			if (maxx == -1)
			{
				sort(e1 + 1, e1 + n + 1, cmp2);
				for (int i = 1; i <= m; i++)
				{
					e[e1[i].id].f = 1;
				}
			}
			else
			{
				e[f].f = 1;
				sort(e1 + 1, e1 + n + 1, cmp2);
				for (int i = 1; i <= m - 1; i++)
				{
					e[e1[i].id].f = 1;
				}
			}
		}
		else
		{
			int x;
			cin >> x;
			if (e[x].f)
				cout << 1 << endl;
			else
				cout << 0 << endl;
		}
	}*/
}
int main()
{
	std::ios::sync_with_stdio(0);
	std::cin.tie(0);
	std::cout.tie(0);
	int t = 1;
	// cin >> t;
	while (t--)
		solve1();
	return 0;
}