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#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
struct bin_tree {
size_t index;
unsigned long long value;
struct bin_tree *right;
struct bin_tree *left;
};
typedef struct bin_tree node;
void insert(node ** tree, size_t index) {
node *temp = NULL;
if(!(*tree)) {
temp = (node *)malloc(sizeof(node));
temp->left = temp->right = NULL;
temp->index = index;
temp->value = 1;
*tree = temp;
return;
}
if(index < (*tree)->index)
insert(&(*tree)->left, index);
else if(index > (*tree)->index)
insert(&(*tree)->right, index);
}
void deltree(node * tree) {
if (tree) {
deltree(tree->left);
deltree(tree->right);
free(tree);
}
}
node* search(node ** tree, size_t index) {
if(!(*tree))
return NULL;
if(index < (*tree)->index)
search(&((*tree)->left), index);
else if(index > (*tree)->index)
search(&((*tree)->right), index);
else if(index == (*tree)->index)
return *tree;
}
unsigned long long *lookup(node **tree, size_t index) {
node *ret = search(tree, index);
if(ret)
return ret->value;
else
return 0;
}
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