#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
//復習スライド見た
int main(){
    int i,j,k;
    int a,b;
    int **mat;
    scanf("%d %d",&a,&b);
    scanf("%d",&a,&b);//nに4を代入
	mat=(int **)malloc(sizeof(int*)*a);	//ここで2次元配列の動的確保をする
	if(mat==NULL){
	printf("ERROR\n");
		return 0;
	}
 
 
	//ここで2次元配列に数値を代入する
	for(int i=0;i<a;i++){
		mat[i]=(int*)malloc(sizeof(int*)*b);
	}
    //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");
    }
 
    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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