#include<stdio.h>
int main(void) {
   int n = 1000, i, l, s[1000];
   while ( n ) { s[n] = 0; n--; }
   s[1] = 1;
   for ( i = 2; i < 1000; i++ ) {
      if ( s[i] == 0 ) {
         for ( l = 2; l <= 1000 / i; l++ ) s[ i * l] = 1;
      }
   }
   for ( i = 1; i < 1000; i++ ) printf("s[%d]:%d\n", i, s[i]);
   return 0;
}