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
2026-09-01 04:47:12 +00:00 · 2025-12-31 07:44:52 +08:00
parent 45e1295241
commit 2778a6f9c7
1284 changed files with 71557 additions and 3275 deletions
@@ -0,0 +1,50 @@
+/**
+ * File: permutations_i.swift
+ * Created Time: 2023-04-30
+ * Author: nuomi1 (nuomi1@qq.com)
+ */
+
+/* Backtracking algorithm: Permutations I */
+func backtrack(state: inout [Int], choices: [Int], selected: inout [Bool], res: inout [[Int]]) {
+    // When the state length equals the number of elements, record the solution
+    if state.count == choices.count {
+        res.append(state)
+        return
+    }
+    // Traverse all choices
+    for (i, choice) in choices.enumerated() {
+        // Pruning: do not allow repeated selection of elements
+        if !selected[i] {
+            // Attempt: make choice, update state
+            selected[i] = true
+            state.append(choice)
+            // Proceed to the next round of selection
+            backtrack(state: &state, choices: choices, selected: &selected, res: &res)
+            // Backtrack: undo choice, restore to previous state
+            selected[i] = false
+            state.removeLast()
+        }
+    }
+}
+
+/* Permutations I */
+func permutationsI(nums: [Int]) -> [[Int]] {
+    var state: [Int] = []
+    var selected = Array(repeating: false, count: nums.count)
+    var res: [[Int]] = []
+    backtrack(state: &state, choices: nums, selected: &selected, res: &res)
+    return res
+}
+
+@main
+enum PermutationsI {
+    /* Driver Code */
+    static func main() {
+        let nums = [1, 2, 3]
+
+        let res = permutationsI(nums: nums)
+
+        print("Input array nums = \(nums)")
+        print("All permutations res = \(res)")
+    }
+}