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import { level } from "../binary-tree-level-order-traversal-ii/level.ts";import { TreeNode } from "../mod.ts";
export default function findBottomLeftValue(root: TreeNode | null): number {    if (!root) return 0;    const current: TreeNode[] = [root];    const result: number[][] = [];
    level(current, (r) => {        result.length = 0;        result.push(r);    });    return result[result.length - 1][0];}