From 066e62b5da12ce4bfd635b03e561d45cf44f55bd Mon Sep 17 00:00:00 2001
From: Lanre Adedara <lanre.adedara@shara.co>
Date: Fri, 30 Aug 2024 08:21:19 +0100
Subject: [PATCH] feat: add swift implementation to lcof2 problem: No.081

---
 .../README.md"                                | 32 +++++++++++++++++++
 .../Solution.swift"                           | 27 ++++++++++++++++
 2 files changed, 59 insertions(+)
 create mode 100644 "lcof2/\345\211\221\346\214\207 Offer II 081. \345\205\201\350\256\270\351\207\215\345\244\215\351\200\211\346\213\251\345\205\203\347\264\240\347\232\204\347\273\204\345\220\210/Solution.swift"

diff --git "a/lcof2/\345\211\221\346\214\207 Offer II 081. \345\205\201\350\256\270\351\207\215\345\244\215\351\200\211\346\213\251\345\205\203\347\264\240\347\232\204\347\273\204\345\220\210/README.md" "b/lcof2/\345\211\221\346\214\207 Offer II 081. \345\205\201\350\256\270\351\207\215\345\244\215\351\200\211\346\213\251\345\205\203\347\264\240\347\232\204\347\273\204\345\220\210/README.md"
index 5ea16337e40df..5eecf3be5eff7 100644
--- "a/lcof2/\345\211\221\346\214\207 Offer II 081. \345\205\201\350\256\270\351\207\215\345\244\215\351\200\211\346\213\251\345\205\203\347\264\240\347\232\204\347\273\204\345\220\210/README.md"	
+++ "b/lcof2/\345\211\221\346\214\207 Offer II 081. \345\205\201\350\256\270\351\207\215\345\244\215\351\200\211\346\213\251\345\205\203\347\264\240\347\232\204\347\273\204\345\220\210/README.md"	
@@ -258,6 +258,38 @@ public class Solution
 }
 ```
 
+#### Swift
+
+```swift
+class Solution {
+    private var ans: [[Int]] = []
+    private var target: Int = 0
+    private var candidates: [Int] = []
+
+    func combinationSum(_ candidates: [Int], _ target: Int) -> [[Int]] {
+        self.ans = []
+        self.target = target
+        self.candidates = candidates
+        dfs(0, 0, [])
+        return ans
+    }
+
+    private func dfs(_ sum: Int, _ index: Int, _ current: [Int]) {
+        if sum == target {
+            ans.append(current)
+            return
+        }
+        if sum > target {
+            return
+        }
+        for i in index..<candidates.count {
+            let candidate = candidates[i]
+            dfs(sum + candidate, i, current + [candidate])
+        }
+    }
+}
+```
+
 <!-- tabs:end -->
 
 <!-- solution:end -->
diff --git "a/lcof2/\345\211\221\346\214\207 Offer II 081. \345\205\201\350\256\270\351\207\215\345\244\215\351\200\211\346\213\251\345\205\203\347\264\240\347\232\204\347\273\204\345\220\210/Solution.swift" "b/lcof2/\345\211\221\346\214\207 Offer II 081. \345\205\201\350\256\270\351\207\215\345\244\215\351\200\211\346\213\251\345\205\203\347\264\240\347\232\204\347\273\204\345\220\210/Solution.swift"
new file mode 100644
index 0000000000000..ad2150ec3f31c
--- /dev/null
+++ "b/lcof2/\345\211\221\346\214\207 Offer II 081. \345\205\201\350\256\270\351\207\215\345\244\215\351\200\211\346\213\251\345\205\203\347\264\240\347\232\204\347\273\204\345\220\210/Solution.swift"	
@@ -0,0 +1,27 @@
+class Solution {
+    private var ans: [[Int]] = []
+    private var target: Int = 0
+    private var candidates: [Int] = []
+
+    func combinationSum(_ candidates: [Int], _ target: Int) -> [[Int]] {
+        self.ans = []
+        self.target = target
+        self.candidates = candidates
+        dfs(0, 0, [])
+        return ans
+    }
+
+    private func dfs(_ sum: Int, _ index: Int, _ current: [Int]) {
+        if sum == target {
+            ans.append(current)
+            return
+        }
+        if sum > target {
+            return
+        }
+        for i in index..<candidates.count {
+            let candidate = candidates[i]
+            dfs(sum + candidate, i, current + [candidate])
+        }
+    }
+}
\ No newline at end of file