#include<stdio.h>

void vec_to_matrix(int *v, int *mat, int n)
{
	int i,j;
	for(i=0;i<9;i++)
			*(mat++) = v[i];
}
	
int main()
{
	int i,j;
	int arr[9];
	int mat[3][3];
	int index = 0, temp;
      printf("Enter integers, ending with -1.\n");
      do
      {
        scanf("%d", &temp);
        if (index >= 10)
        {
          printf("EXCEEDED ARRAY SIZE of 20\n");
         break;
        }
        else
        {
          arr[index] = temp;
          index++;
         }
      } while (temp != -1);

	vec_to_matrix(arr,mat[0],9);
	
	for(i=0;i<3;i++)
	{
		for(j=0;j<3;j++)
		{
			printf("%d ",mat[i][j]);
		}
		printf("\n");
	}
}