feat: add swift implementation to lcof2 problem: No.073 (#3306)

Author: klever34

lcof2/剑指 Offer II 073. 狒狒吃香蕉/README.md

@@ -182,6 +182,34 @@ public class Solution {
 }
 ```
 
+#### Swift
+
+```swift
+class Solution {
+    func minEatingSpeed(_ piles: [Int], _ h: Int) -> Int {
+        var left = 1
+        var right = piles.max() ?? 0
+        
+        while left < right {
+            let mid = (left + right) / 2
+            var hours = 0
+            
+            for pile in piles {
+                hours += (pile + mid - 1) / mid
+            }
+            
+            if hours <= h {
+                right = mid
+            } else {
+                left = mid + 1
+            }
+        }
+        
+        return left
+    }
+}
+```
+
 <!-- tabs:end -->
 
 <!-- solution:end -->

lcof2/剑指 Offer II 073. 狒狒吃香蕉/Solution.swift

@@ -0,0 +1,23 @@
+class Solution {
+    func minEatingSpeed(_ piles: [Int], _ h: Int) -> Int {
+        var left = 1
+        var right = piles.max() ?? 0
+        
+        while left < right {
+            let mid = (left + right) / 2
+            var hours = 0
+            
+            for pile in piles {
+                hours += (pile + mid - 1) / mid
+            }
+            
+            if hours <= h {
+                right = mid
+            } else {
+                left = mid + 1
+            }
+        }
+        
+        return left
+    }
+}