#include <fstream>

#define MAX 505

using namespace std;

int v[MAX][MAX], actual = 0;

void DivideEtImpera(int x1, int y1, int x2, int y2)
{
    if(x1 > x2 || y1 > y2) return;
    int width = x2 - x1 + 1, height = y2 - y1 + 1, minim = min(width, height), i, j, k;
    for(i = 0; (1 << i) <= minim; i++); i--;
    actual++;
    for(j = x1; j < x1 + (1 << i); j++)
        for(k = y1; k < y1 + (1 << i); k++)
            v[j][k] = actual;
    DivideEtImpera(x1, y1 + (1<<i), x1 + (1<<i) - 1, y2);
    DivideEtImpera(x1 + (1<<i), y1, x2, y2);
}


int main()
{
    int n, m;
    ifstream in("piese.in"); in>>n>>m; in.close();
    DivideEtImpera(1, 1, n, m);
    ofstream out("piese.out");
    out<<actual<<"\n";
    for(int i = 1; i <= n; i++)
    {
        for(int j = 1; j <= m; j++) out<<v[i][j]<<" ";
        out<<"\n";
    }
    return 0;
}