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https://github.com/krahets/hello-algo.git
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Re-translate the Japanese version (#1871)
* Retranslate Japanese docs with GPT-5.4 * Retranslate Japanese code with GPT-5.4
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@@ -0,0 +1,32 @@
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// File: ListNode.cs
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// Created Time: 2022-12-16
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// Author: mingXta (1195669834@qq.com)
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namespace hello_algo.utils;
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/* 連結リストノード */
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public class ListNode(int x) {
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public int val = x;
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public ListNode? next;
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/* 配列をデシリアライズして連結リストに変換する */
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public static ListNode? ArrToLinkedList(int[] arr) {
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ListNode dum = new(0);
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ListNode head = dum;
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foreach (int val in arr) {
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head.next = new ListNode(val);
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head = head.next;
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}
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return dum.next;
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}
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public override string? ToString() {
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List<string> list = [];
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var head = this;
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while (head != null) {
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list.Add(head.val.ToString());
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head = head.next;
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}
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return string.Join("->", list);
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}
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}
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@@ -0,0 +1,132 @@
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/**
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* File: PrintUtil.cs
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* Created Time: 2022-12-23
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* Author: haptear (haptear@hotmail.com), krahets (krahets@163.com)
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*/
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namespace hello_algo.utils;
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public class Trunk(Trunk? prev, string str) {
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public Trunk? prev = prev;
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public string str = str;
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};
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public static class PrintUtil {
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/* リストを出力する */
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public static void PrintList<T>(IList<T> list) {
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Console.WriteLine("[" + string.Join(", ", list) + "]");
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}
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public static string PrintList<T>(this IEnumerable<T?> list) {
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return $"[ {string.Join(", ", list.Select(x => x?.ToString() ?? "null"))} ]";
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}
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/* 行列を出力する (Array) */
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public static void PrintMatrix<T>(T[][] matrix) {
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Console.WriteLine("[");
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foreach (T[] row in matrix) {
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Console.WriteLine(" " + string.Join(", ", row) + ",");
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}
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Console.WriteLine("]");
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}
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/* 行列を出力 (List) */
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public static void PrintMatrix<T>(List<List<T>> matrix) {
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Console.WriteLine("[");
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foreach (List<T> row in matrix) {
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Console.WriteLine(" " + string.Join(", ", row) + ",");
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}
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Console.WriteLine("]");
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}
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/* 連結リストを出力 */
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public static void PrintLinkedList(ListNode? head) {
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List<string> list = [];
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while (head != null) {
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list.Add(head.val.ToString());
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head = head.next;
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}
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Console.Write(string.Join(" -> ", list));
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}
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/**
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* 二分木を出力
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* This tree printer is borrowed from TECHIE DELIGHT
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* https://www.techiedelight.com/c-program-print-binary-tree/
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*/
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public static void PrintTree(TreeNode? root) {
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PrintTree(root, null, false);
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}
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/* 二分木を出力 */
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public static void PrintTree(TreeNode? root, Trunk? prev, bool isRight) {
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if (root == null) {
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return;
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}
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string prev_str = " ";
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Trunk trunk = new(prev, prev_str);
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PrintTree(root.right, trunk, true);
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if (prev == null) {
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trunk.str = "———";
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} else if (isRight) {
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trunk.str = "/———";
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prev_str = " |";
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} else {
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trunk.str = "\\———";
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prev.str = prev_str;
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}
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ShowTrunks(trunk);
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Console.WriteLine(" " + root.val);
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if (prev != null) {
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prev.str = prev_str;
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}
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trunk.str = " |";
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PrintTree(root.left, trunk, false);
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}
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public static void ShowTrunks(Trunk? p) {
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if (p == null) {
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return;
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}
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ShowTrunks(p.prev);
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Console.Write(p.str);
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}
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/* ハッシュテーブルを出力 */
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public static void PrintHashMap<K, V>(Dictionary<K, V> map) where K : notnull {
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foreach (var kv in map.Keys) {
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Console.WriteLine(kv.ToString() + " -> " + map[kv]?.ToString());
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}
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}
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/* ヒープを出力 */
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public static void PrintHeap(Queue<int> queue) {
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Console.Write("ヒープの配列表現:");
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List<int> list = [.. queue];
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Console.WriteLine(string.Join(',', list));
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Console.WriteLine("ヒープの木構造表示:");
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TreeNode? tree = TreeNode.ListToTree(list.Cast<int?>().ToList());
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PrintTree(tree);
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}
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/* 優先キューを出力 */
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public static void PrintHeap(PriorityQueue<int, int> queue) {
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var newQueue = new PriorityQueue<int, int>(queue.UnorderedItems, queue.Comparer);
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Console.Write("ヒープの配列表現:");
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List<int> list = [];
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while (newQueue.TryDequeue(out int element, out _)) {
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list.Add(element);
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}
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Console.WriteLine("ヒープの木構造表示:");
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Console.WriteLine(string.Join(',', list.ToList()));
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TreeNode? tree = TreeNode.ListToTree(list.Cast<int?>().ToList());
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PrintTree(tree);
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}
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}
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@@ -0,0 +1,67 @@
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/**
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* File: TreeNode.cs
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* Created Time: 2022-12-23
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* Author: haptear (haptear@hotmail.com)
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*/
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namespace hello_algo.utils;
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/* 二分木ノードクラス */
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public class TreeNode(int? x) {
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public int? val = x; // ノード値
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public int height; // ノードの高さ
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public TreeNode? left; // 左子ノードへの参照
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public TreeNode? right; // 右子ノードへの参照
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// シリアライズの符号化規則は以下を参照:
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// https://www.hello-algo.com/chapter_tree/array_representation_of_tree/
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// 二分木の配列表現:
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// [1, 2, 3, 4, None, 6, 7, 8, 9, None, None, 12, None, None, 15]
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// 二分木の連結リスト表現:
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// /——— 15
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// /——— 7
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// /——— 3
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// | \——— 6
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// | \——— 12
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// ——— 1
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// \——— 2
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// | /——— 9
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// \——— 4
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// \——— 8
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/* リストを二分木にデシリアライズする: 再帰 */
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static TreeNode? ListToTreeDFS(List<int?> arr, int i) {
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if (i < 0 || i >= arr.Count || !arr[i].HasValue) {
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return null;
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}
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TreeNode root = new(arr[i]) {
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left = ListToTreeDFS(arr, 2 * i + 1),
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right = ListToTreeDFS(arr, 2 * i + 2)
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};
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return root;
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}
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/* リストを二分木にデシリアライズする */
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public static TreeNode? ListToTree(List<int?> arr) {
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return ListToTreeDFS(arr, 0);
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}
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/* 二分木をリストにシリアライズする: 再帰 */
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static void TreeToListDFS(TreeNode? root, int i, List<int?> res) {
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if (root == null)
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return;
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while (i >= res.Count) {
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res.Add(null);
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}
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res[i] = root.val;
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TreeToListDFS(root.left, 2 * i + 1, res);
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TreeToListDFS(root.right, 2 * i + 2, res);
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}
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/* 二分木をリストにシリアライズする */
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public static List<int?> TreeToList(TreeNode root) {
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List<int?> res = [];
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TreeToListDFS(root, 0, res);
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return res;
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}
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}
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@@ -0,0 +1,30 @@
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/**
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* File: Vertex.cs
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* Created Time: 2023-02-06
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* Author: zjkung1123 (zjkung1123@gmail.com), krahets (krahets@163.com)
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*/
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namespace hello_algo.utils;
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/* 頂点クラス */
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public class Vertex(int val) {
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public int val = val;
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/* 値リスト vals を入力し、頂点リスト vets を返す */
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public static Vertex[] ValsToVets(int[] vals) {
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Vertex[] vets = new Vertex[vals.Length];
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for (int i = 0; i < vals.Length; i++) {
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vets[i] = new Vertex(vals[i]);
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}
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return vets;
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}
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/* 頂点リスト vets を入力し、値リスト vals を返す */
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public static List<int> VetsToVals(List<Vertex> vets) {
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List<int> vals = [];
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foreach (Vertex vet in vets) {
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vals.Add(vet.val);
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}
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return vals;
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}
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}
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