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index.ts
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index.ts
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import { TreeNode } from "../binary-tree-inorder-traversal/TreeNode.ts";
import { Node } from "../n-ary-tree-level-order-traversal/Node.ts";
export function encode(root: Node | null): TreeNode | null {
if (!root) {
return root;
}
const nero = new TreeNode(root.val);
const children = root.children;
if (children.length === 0) {
return nero;
} else {
const left = encode(children[0]);
nero.left = left;
if (children.length === 1) {
return nero;
}
let cur: TreeNode | null = left;
for (let i = 1; i < children.length; i++) {
const right = encode(children[i]);
cur && (cur.right = right);
cur = right;
}
return nero;
}
}
export function decode(root: TreeNode | null): Node | null {
if (!root) {
return root;
}
const nero = new Node(root.val);
if (!root.left) {
return nero;
} else {
let cur: TreeNode | null = root.left;
while (cur) {
const child = decode(cur);
child && nero.children.push(child);
cur = cur.right;
}
return nero;
}
}