//二次元配列
#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;
    int a, b;
    int **mat;
    int cnt = 1;
 
    scanf("%d %d", &a, &b);
 
    // 2次元配列の動的確保
    mat = (int **)malloc(sizeof(int *) * a);
    for (i = 0; i < a; i++) {
        mat[i] = (int *)malloc(sizeof(int) * b);
    }
 
    // 2次元配列に数値を代入（1,2,3,...）
    for (i = 0; i < a; i++) {
        for (j = 0; j < b; j++) {
            mat[i][j] = cnt++;
        }
    }
 
    // 表示部分
    for (i = 0; i < a; i++) {
        for (j = 0; j < b; j++) {
            printf("%d ", mat[i][j]);
        }
        printf("\n");
    }
 
    // 動的確保したメモリの解放
    for (i = 0; i < a; i++) {
        free(mat[i]);
    }
    free(mat);
 
    return 0;
}
//2 3  答え 123\n456

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2 3