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// 1261. Find Elements in a Contaminated Binary Tree
#include "leetcode.h"
/*
* given a binary tree with the following rules: 'root.val == 0', for any
* 'TreeNode': if 'TreeNode.val' has a value 'x' and 'TreeNode.left != null'
* then 'TreeNode.left.val == 2 * x + 1', and if 'TreeNode.val' has a value 'x'
* and 'TreeNode.right != null', then 'TreeNode.right.val = 2 * x + 2'. now the
* binary tree is contaminated which means all 'TreeNode.val' have been changed
* to -1. implemented the 'FindElements' class: 'findElementsCreate':
* initialises the object with a contaminated tree and recovers it. 'bool
* find(int target)' returns 'true' if the 'target' value exists in the
* recovered binary tree.
*/
typedef struct {
int map[10000];
int map_size;
} FindElements;
void recover(FindElements *obj, struct TreeNode *node, int val) {
obj->map[obj->map_size] = val;
obj->map_size++;
if (node->left)
recover(obj, node->left, val * 2 + 1);
if (node->right)
recover(obj, node->right, val * 2 + 2);
return;
}
FindElements *findElementsCreate(struct TreeNode *root) {
FindElements *tree = (FindElements *)calloc(1, sizeof(FindElements));
recover(tree, root, 0);
return tree;
}
bool findElementsFind(FindElements *obj, int target) {
for (int i = 0; i < obj->map_size; i++)
if (obj->map[i] == target)
return true;
return false;
}
void findElementsFree(FindElements *obj) { free(obj); }
int main() {
struct TreeNode *r1 = treenode_create(-1);
r1->left = NULL;
r1->right = treenode_create(-1);
struct TreeNode *r2 = treenode_create(-1);
r2->left = treenode_create(-1);
r2->right = treenode_create(-1);
r2->left->left = treenode_create(-1);
r2->left->right = treenode_create(-1);
struct TreeNode *r3 = treenode_create(-1);
r3->left = NULL;
r3->right = treenode_create(-1);
r3->right->left = treenode_create(-1);
r3->right->right = NULL;
r3->right->left->left = treenode_create(-1);
r3->right->left->right = NULL;
FindElements *o1 = findElementsCreate(r1);
FindElements *o2 = findElementsCreate(r2);
FindElements *o3 = findElementsCreate(r3);
printf("%d\n", findElementsFind(o1, 1)); // expect: 0
printf("%d\n", findElementsFind(o1, 2)); // expect: 1
printf("%d\n", findElementsFind(o2, 1)); // expect: 1
printf("%d\n", findElementsFind(o2, 3)); // expect: 1
printf("%d\n", findElementsFind(o2, 5)); // expect: 0
printf("%d\n", findElementsFind(o3, 2)); // expect: 1
printf("%d\n", findElementsFind(o3, 3)); // expect: 0
printf("%d\n", findElementsFind(o3, 4)); // expect: 0
printf("%d\n", findElementsFind(o3, 5)); // expect: 1
findElementsFree(o1);
findElementsFree(o2);
findElementsFree(o3);
treenode_free(r1);
treenode_free(r2);
treenode_free(r3);
}
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