#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;
    int a,b;
    int **mat;
    scanf("%d %d",&a,&b);
 
	//ここで2次元配列の動的確保をする
    mat=(int **)malloc(4*a);
    if(mat==NULL){
    	printf("ERROR");
    	return 0;
    }
    for(i=0;i<a;i++){
    	mat[i]=(int *)malloc(sizeof(int)*b);
    	if(mat[i]==NULL){
    		printf("ERROR");
    		return 0;
    	}
    }
 
 
    for(i=0;i<a;i++){
    	for(j=0;j<b;j++){
    		mat[i][j]=k++;
    	}
    }
	//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");
    }
 
    //さて，最後に忘れずにすることと言えば？
	for(i=0;i<a;i++){
		free(mat[i]);
	}
	free(mat);
    return 0;
}
 

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