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

void print(int a[9][9]) {
	printf("|-----------------------|\n");
    int i,j;
	for(i=0;i<9;i++){
		printf("| ");
		for(j=0;j<9;j++){
			printf("%d ",a[i][j]);
			if(j==2||j==5) printf("| ");
			if(j==8) printf("|\n");
		}
		if(i==2||i==5) {
			int x=22;
			printf("|");
			while(x>=0) {
				printf("-");
				x--;
			}
			printf("|\n");
		}
	}
	printf("|-----------------------|\n");
}

int main() {
	srand((unsigned int)time(NULL));
    int a[9][9];
    int i,j;
    for (i = 0; i < 9; i++) {
        for (j = 0; j < 9; j++) {
            a[i][j] = 0;
        }
    }
    int nums1_9[9] = {1, 2, 3, 4, 5, 6, 7, 8, 9};
    int used[9] = {0};
    for(j=0;j<9;j++){
    	if(j==3||j==6) {
    		for(i=0;i<9;i++) used[i]=0;
		}
    	    //printf("%d",j);
    	for (i = 0; i < 3; i++) {
        	int pos, num;
        	do {
            	pos = rand() % 9;
        	} while (a[j][pos]!= 0);
        	do {
            	num = rand() % 9;
        	} while (used[num]);
        	//printf("%d %d\n",pos,num);
        	a[j][pos] = nums1_9[num];
        	used[num] = 1;
    	}
    }
    print(a);
    return 0;
}