feat: add swift implementation to lcof2 problem: No.038 (#3048)

Author: klever34

lcof2/剑指 Offer II 038. 每日温度/README.md

@@ -180,6 +180,28 @@ impl Solution {
 }
 ```
 
+#### Swift
+
+```swift
+class Solution {
+    func dailyTemperatures(_ temperatures: [Int]) -> [Int] {
+        let n = temperatures.count
+        var ans = [Int](repeating: 0, count: n)
+        var stack = [Int]()
+        
+        for i in 0..<n {
+            while !stack.isEmpty && temperatures[stack.last!] < temperatures[i] {
+                let j = stack.removeLast()
+                ans[j] = i - j
+            }
+            stack.append(i)
+        }
+        
+        return ans
+    }
+}
+```
+
 <!-- tabs:end -->
 
 <!-- solution:end -->

lcof2/剑指 Offer II 038. 每日温度/Solution.swift

@@ -0,0 +1,17 @@
+class Solution {
+    func dailyTemperatures(_ temperatures: [Int]) -> [Int] {
+        let n = temperatures.count
+        var ans = [Int](repeating: 0, count: n)
+        var stack = [Int]()
+        
+        for i in 0..<n {
+            while !stack.isEmpty && temperatures[stack.last!] < temperatures[i] {
+                let j = stack.removeLast()
+                ans[j] = i - j
+            }
+            stack.append(i)
+        }
+        
+        return ans
+    }
+}