#define chatgpt3_5 "bits/stdc++.h"
#define chatgpt4 "bits/extc++.h"

#include chatgpt3_5

using namespace std;

//#define FLOATING_OCEAN

#define int long long
#define pii pair<int, int>
#define pipi pair<pii, pii>
#define tpi tuple<int, int, int>
#define fs first
#define sc second
#define pb emplace_back
#define ep emplace
#define rall(x) x.rbegin(),x.rend()
#define all(x) x.begin(),x.end()

const int N = 2e5 + 10, M = 2e5 + 10, mod = 998244353, inf = 0x3f3f3f3f3f3f3f3f;
const double eps = 1e-9, PI = acos(-1);

void solve() {
    int n, m;
    cin >> n >> m;
    int a = n, b = m;
    if (a < b) swap(a, b);
    cout << (b + (a - b + 1) / 2) << '\n';
    cout.flush();
    vector<vector<int>> ans(n + 1, vector<int>(m + 1));
    for (int i = 1; i <= min(n, m); i++) ans[i][i] = 1;
    if (n > m){
        for(int i=min(n, m)+2;i<=n;i+=2) ans[i][1] = 1;
        ans[n][1] = 1;
    }else if(n < m){
        for(int j=min(n, m)+2;j<=m;j+=2) ans[1][j] = 1;
        ans[1][m] = 1;
    }
    for (int i = 1; i <= n; i++) {
        for (int j = 1; j <= m; j++) {
            cout << ans[i][j] << ' ';
        }
        cout << '\n';
    }
    cout.flush();
}

signed main() {
# ifdef FLOATING_OCEAN
    freopen("1.in","r",stdin);
    freopen("1.out","w",stdout);
# endif
    ios::sync_with_stdio(false), cin.tie(0), cout.tie(0);
//    init();
    int t = 1;
//    cin >> t;
    while (t--) solve();
}