#include <stdio.h>
#include <stdlib.h>
 
//必要があれば変数などを追加してもOKです
 
int main(){
    int i,j,k,l=0;
    int a,b;
    int **mat;
    scanf("%d %d",&a,&b);
mat = malloc(sizeof(int*)*a);
 for(i=0;i<a;i++){
 	mat[i] = malloc(sizeof(int)*b);
 }
	//ここで2次元配列の動的確保をする
    for(j=0;j<a;j++){
    for(k=0;k<b;k++){
    	mat[j][k]=l;
    	l++;
    }
    }
	//ここで2次元配列に数値を代入する
 
 
    //以下の部分は表示の部分です
    //いじらなくてOK
    for(i=0;i<a;i++){
        for(j=0;j<b;j++){
            printf("%d ",mat[i][j]);
        }
        printf("\n");
    }
    for(i = 0; i < a; i++){
        free(mat[i]); 
    }
    free(mat);  
    //さて，最後に忘れずにすることと言えば？
 
 
    return 0;
}
 

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