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#ifndef LEETCODE_HEADERS_HPP #define LEETCODE_HEADERS_HPP #include <vector> #include <iostream> #include <unordered_map> #include <deque> #include <queue> #include <stack> #include <variant> #include <map> #include <unordered_set> #include <sstream> #include <algorithm> #include "TreePrinter.hpp" #include <regex> #include <random> using namespace std; struct ListNode { int val; ListNode *next; ListNode() : val(0), next(nullptr) {} ListNode(int x) : val(x), next(nullptr) {} ListNode(int x, ListNode *next) : val(x), next(next) {} }; struct TreeNode { int val; TreeNode *left; TreeNode *right; TreeNode() : val(0), left(nullptr), right(nullptr) {} TreeNode(int x) : val(x), left(nullptr), right(nullptr) {} TreeNode(int x, TreeNode *left, TreeNode *right) : val(x), left(left), right(right) {} }; namespace utils { ListNode *init_list(const std::vector<int> &nums) { ListNode *res = nullptr; for (int i = (int) nums.size() - 1; i >= 0; --i) res = new ListNode(nums[i], res); return res; } TreeNode *init_tree(deque<variant<int, nullptr_t>> nums) { TreeNode *result = nullptr; if (nums.empty()) return result; result = new TreeNode(get<int>(nums.front())); nums.pop_front(); queue<TreeNode *> node_queue; node_queue.push(result); while (!node_queue.empty()) { TreeNode *curNode = node_queue.front(); node_queue.pop(); if (!nums.empty()) { curNode->left = std::holds_alternative<int>(nums.front()) ? new TreeNode(get<int>(nums.front())) : nullptr; nums.pop_front(); } if (!nums.empty()) { curNode->right = std::holds_alternative<int>(nums.front()) ? new TreeNode(get<int>(nums.front())) : nullptr; nums.pop_front(); } if (curNode->left) node_queue.push(curNode->left); if (curNode->right) node_queue.push(curNode->right); } return result; } void print_link_list(ListNode *list) { if (!list) { std::cout << std::endl; return; } while (list) { std::cout << list->val << (list->next ? " --> " : "\n"); list = list->next; } } void print_tree(TreeNode *root) { tree_printer::TreePrinter<TreeNode> printer( [](TreeNode *node) -> std::string { return std::to_string(node->val); }, [](TreeNode *node) -> TreeNode * { return node->left; }, [](TreeNode *node) -> TreeNode * { return node->right; } ); printer.setHspace(5); printer.printTree(root); } template<typename T> void print_vector(const vector<T> &list) { cout << "["; for (int i = 0; i < list.size(); ++i) { string delimiter; if (is_same<T, string>::value) delimiter = "\""; if (is_same<T, char>::value) delimiter = "\'"; cout << (i == 0 ? "" : ", ") << delimiter << list[i] << delimiter; } cout << "]" << endl; } } #endif
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