#include <stdio.h>
 
enum node_type {LEAF, NODE};
 
struct node {
  enum node_type type;
};
 
int parse_tree( struct node* n ) {
    switch( n->type ) {
    case NODE: return 1;
    case LEAF: return 2;
    }  
}
 
int main() {
  struct node n;
  printf("%d", parse_tree(&n));
  return 0;
}