mirror of
https://github.com/krahets/hello-algo.git
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Translate all code to English (#1836)
* Review the EN heading format. * Fix pythontutor headings. * Fix pythontutor headings. * bug fixes * Fix headings in **/summary.md * Revisit the CN-to-EN translation for Python code using Claude-4.5 * Revisit the CN-to-EN translation for Java code using Claude-4.5 * Revisit the CN-to-EN translation for Cpp code using Claude-4.5. * Fix the dictionary. * Fix cpp code translation for the multipart strings. * Translate Go code to English. * Update workflows to test EN code. * Add EN translation for C. * Add EN translation for CSharp. * Add EN translation for Swift. * Trigger the CI check. * Revert. * Update en/hash_map.md * Add the EN version of Dart code. * Add the EN version of Kotlin code. * Add missing code files. * Add the EN version of JavaScript code. * Add the EN version of TypeScript code. * Fix the workflows. * Add the EN version of Ruby code. * Add the EN version of Rust code. * Update the CI check for the English version code. * Update Python CI check. * Fix cmakelists for en/C code. * Fix Ruby comments
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@@ -8,20 +8,20 @@
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/* Binary search: problem f(i, j) */
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int dfs(vector<int> &nums, int target, int i, int j) {
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// If the interval is empty, indicating no target element, return -1
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// If the interval is empty, it means there is no target element, return -1
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if (i > j) {
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return -1;
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}
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// Calculate midpoint index m
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int m = i + (j - i) / 2;
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// Calculate the midpoint index m
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int m = (i + j) / 2;
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if (nums[m] < target) {
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// Recursive subproblem f(m+1, j)
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// Recursion subproblem f(m+1, j)
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return dfs(nums, target, m + 1, j);
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} else if (nums[m] > target) {
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// Recursive subproblem f(i, m-1)
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// Recursion subproblem f(i, m-1)
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return dfs(nums, target, i, m - 1);
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} else {
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// Found the target element, thus return its index
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// Found the target element, return its index
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return m;
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}
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}
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@@ -29,7 +29,7 @@ int dfs(vector<int> &nums, int target, int i, int j) {
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/* Binary search */
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int binarySearch(vector<int> &nums, int target) {
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int n = nums.size();
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// Solve problem f(0, n-1)
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// Solve the problem f(0, n-1)
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return dfs(nums, target, 0, n - 1);
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}
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@@ -38,9 +38,9 @@ int main() {
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int target = 6;
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vector<int> nums = {1, 3, 6, 8, 12, 15, 23, 26, 31, 35};
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// Binary search (double closed interval)
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// Binary search (closed interval on both sides)
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int index = binarySearch(nums, target);
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cout << "Index of target element 6 =" << index << endl;
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cout << "Index of target element 6 = " << index << endl;
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return 0;
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}
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}
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@@ -6,26 +6,26 @@
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#include "../utils/common.hpp"
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/* Build binary tree: Divide and conquer */
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/* Build binary tree: divide and conquer */
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TreeNode *dfs(vector<int> &preorder, unordered_map<int, int> &inorderMap, int i, int l, int r) {
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// Terminate when subtree interval is empty
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// Terminate when the subtree interval is empty
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if (r - l < 0)
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return NULL;
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// Initialize root node
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// Initialize the root node
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TreeNode *root = new TreeNode(preorder[i]);
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// Query m to divide left and right subtrees
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// Query m to divide the left and right subtrees
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int m = inorderMap[preorder[i]];
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// Subproblem: build left subtree
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// Subproblem: build the left subtree
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root->left = dfs(preorder, inorderMap, i + 1, l, m - 1);
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// Subproblem: build right subtree
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// Subproblem: build the right subtree
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root->right = dfs(preorder, inorderMap, i + 1 + m - l, m + 1, r);
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// Return root node
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// Return the root node
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return root;
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}
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/* Build binary tree */
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TreeNode *buildTree(vector<int> &preorder, vector<int> &inorder) {
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// Initialize hash table, storing in-order elements to indices mapping
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// Initialize hash map, storing the mapping from inorder elements to indices
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unordered_map<int, int> inorderMap;
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for (int i = 0; i < inorder.size(); i++) {
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inorderMap[inorder[i]] = i;
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@@ -38,9 +38,9 @@ TreeNode *buildTree(vector<int> &preorder, vector<int> &inorder) {
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int main() {
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vector<int> preorder = {3, 9, 2, 1, 7};
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vector<int> inorder = {9, 3, 1, 2, 7};
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cout << "Pre-order traversal = ";
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cout << "Preorder traversal = ";
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printVector(preorder);
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cout << "In-order traversal = ";
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cout << "Inorder traversal = ";
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printVector(inorder);
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TreeNode *root = buildTree(preorder, inorder);
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@@ -6,40 +6,40 @@
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#include "../utils/common.hpp"
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/* Move a disc */
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/* Move a disk */
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void move(vector<int> &src, vector<int> &tar) {
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// Take out a disc from the top of src
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// Take out a disk from the top of src
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int pan = src.back();
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src.pop_back();
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// Place the disc on top of tar
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// Place the disk on top of tar
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tar.push_back(pan);
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}
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/* Solve the Tower of Hanoi problem f(i) */
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void dfs(int i, vector<int> &src, vector<int> &buf, vector<int> &tar) {
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// If only one disc remains on src, move it to tar
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// If there is only one disk left in src, move it directly to tar
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if (i == 1) {
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move(src, tar);
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return;
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}
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// Subproblem f(i-1): move the top i-1 discs from src with the help of tar to buf
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// Subproblem f(i-1): move the top i-1 disks from src to buf using tar
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dfs(i - 1, src, tar, buf);
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// Subproblem f(1): move the remaining one disc from src to tar
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// Subproblem f(1): move the remaining disk from src to tar
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move(src, tar);
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// Subproblem f(i-1): move the top i-1 discs from buf with the help of src to tar
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// Subproblem f(i-1): move the top i-1 disks from buf to tar using src
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dfs(i - 1, buf, src, tar);
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}
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/* Solve the Tower of Hanoi problem */
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void solveHanota(vector<int> &A, vector<int> &B, vector<int> &C) {
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int n = A.size();
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// Move the top n discs from A with the help of B to C
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// Move the top n disks from A to C using B
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dfs(n, A, B, C);
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}
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/* Driver Code */
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int main() {
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// The tail of the list is the top of the pillar
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// The tail of the list is the top of the rod
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vector<int> A = {5, 4, 3, 2, 1};
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vector<int> B = {};
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vector<int> C = {};
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