#include "soln.hpp" int main() { TreeNode n7 = TreeNode(7); TreeNode n15 = TreeNode(15); TreeNode n20 = TreeNode(20, &n15, &n7); TreeNode n9 = TreeNode(9); TreeNode n3 = TreeNode(3, &n9, &n20); vector> answer = {{3}, {20, 9}, {15, 7}}; Solution soln; cout << "Zigzag level-order traversal correct? " << soln.test(&n3, answer) << endl; return 0; }