#include<iostream>
using namespace std;
int n,d,p;
int m[301][301];
int a[301][301];
int main(){
    freopen("gerrymandering.in", "r", stdin); freopen("gerrymandering.out", "w", stdout);
    cin>>n>>d>>p;
    int k = n*n/d;
    for(int i=0;i<n;i++)
    {
        for(int j=0;j<n;j++) cin>>m[i][j];
    }
    int br=0,t=1;
    for(int i=0;i<n;i++)
    {
        if(i%2==0)
        {
            for(int j=0;j<n;j++)
            {
                if(br==k){br=0; t++;}
                a[i][j]=t;
                br++;
            }
        }
        else
        {
            for(int j=n-1;j>=0;j--)
            {
                if(br==k){br=0; t++;}
                a[i][j]=t;
                br++;
            }
        }
    }
    for(int o=0;o<p;o++)
    {
        for(int i=0;i<n;i++)
        {
            for(int j=0;j<n;j++) cout<<a[i][j]<<" ";
            cout<<endl;
        }
    }
    return 0;
}