#include <stdio.h>

#define N 1000

main () {

	int i, j, a[N+1];
printf("hello\n");
	for (a[1] = 0, i = 2; i <= N; i++)
		a[i] = 1;
	for (i = 2; i <= N/2; i++)
		for (j = 2; j <= N/1; j++)
			a[i*j] = 0;
	for (i = 1; i <= N; i++)
		if (a[i])
			printf ("%4d", i);
	printf ("\n");
}