#include <stdio.h>
#include <stdlib.h>
#include <time.h>

#define SIZE 9

void fillArr(int arr[SIZE][SIZE]) 
{
    for (int block = 0; block < SIZE; block += 3) 
	{
        int seen[10] = {0};

        for (int i = 0; i < 3; i++) 
		{
            int count = 0;
            while (count < 3) 
			{
                int pos = rand() % SIZE;
                if (arr[block + i][pos] == 0) 
				{ 
                    int num = rand() % 9 + 1; 
                    if (!seen[num]) 
					{ 
                        arr[block + i][pos] = num;
                        seen[num] = 1; 
                        count++;
                    }
                }
            }
           
            for (int j = 0; j < SIZE; j++) 
			{
                if (arr[block + i][j] == 0) 
				{
                    arr[block + i][j] = 0;
                }
            }
        }
    }
}

void printarr(int arr[SIZE][SIZE])
{
	int i,j,k,n;
for(n=0;n<=6;n=n+3)
{

printf("|-----------------------|\n") ;
for(i=n;i<=n+2;i++)
{
	for(k=0;k<=6;k=k+3)
	{
		printf("|");
	for(j=k;j<=k+2;j++)
	{
		printf(" %d",arr[i][j]);
	}
	printf(" ");
    }
    printf("|\n");
}

}
printf("|-----------------------|\n") ;
}



int main() 
{
    srand(time(NULL)); 
    int arr[SIZE][SIZE] = {0};

    fillArr(arr);
    printarr(arr);

    return 0;
}