feat: add swift implementation to lcp problem: No.61 (#3932)

Author: klever34

lcp/LCP 61. 气温变化趋势/README.md

@@ -183,6 +183,31 @@ impl Solution {
 }
 ```
 
+#### Swift
+
+```swift
+class Solution {
+    func temperatureTrend(_ temperatureA: [Int], _ temperatureB: [Int]) -> Int {
+        var maxTrend = 0
+        var currentTrend = 0
+
+        for i in 0..<temperatureA.count - 1 {
+            let changeA = temperatureA[i + 1] - temperatureA[i]
+            let changeB = temperatureB[i + 1] - temperatureB[i]
+
+            if (changeA == 0 && changeB == 0) || (changeA * changeB > 0) {
+                currentTrend += 1
+                maxTrend = max(maxTrend, currentTrend)
+            } else {
+                currentTrend = 0
+            }
+        }
+
+        return maxTrend
+    }
+}
+```
+
 <!-- tabs:end -->
 
 <!-- solution:end -->

lcp/LCP 61. 气温变化趋势/Solution.swift

@@ -0,0 +1,20 @@
+class Solution {
+    func temperatureTrend(_ temperatureA: [Int], _ temperatureB: [Int]) -> Int {
+        var maxTrend = 0
+        var currentTrend = 0
+        
+        for i in 0..<temperatureA.count - 1 {
+            let changeA = temperatureA[i + 1] - temperatureA[i]
+            let changeB = temperatureB[i + 1] - temperatureB[i]
+            
+            if (changeA == 0 && changeB == 0) || (changeA * changeB > 0) {
+                currentTrend += 1
+                maxTrend = max(maxTrend, currentTrend)
+            } else {
+                currentTrend = 0
+            }
+        }
+        
+        return maxTrend
+    }
+}