#include <unistd.h>
#include <stdio.h>

int main(void) {
  long result;
  FILE *f;

  result = sysconf(_SC_PAGESIZE);

  if (result == -1) {
    return 1;
  }
  result = ffsl(result) - 1;

  printf("%u\n", result);

  return 0;
}