feat: add swift implementation to lcof2 problem: No.091 (doocs#3477)

klever34 · web-flow · commit d176e427ad83 · 2024-09-03T17:34:10.000+08:00
diff --git a/lcof2/剑指 Offer II 091. 粉刷房子/README.md b/lcof2/剑指 Offer II 091. 粉刷房子/README.md
@@ -156,6 +156,23 @@ impl Solution {
 }
 ```
 
+#### Swift
+
+```swift
+class Solution {
+    func minCost(_ costs: [[Int]]) -> Int {
+        var r = 0, g = 0, b = 0
+        for cost in costs {
+            let _r = r, _g = g, _b = b
+            r = min(_g, _b) + cost[0]
+            g = min(_r, _b) + cost[1]
+            b = min(_r, _g) + cost[2]
+        }
+        return min(r, min(g, b))
+    }
+}
+```
+
 <!-- tabs:end -->
 
 <!-- solution:end -->
diff --git a/lcof2/剑指 Offer II 091. 粉刷房子/Solution.swift b/lcof2/剑指 Offer II 091. 粉刷房子/Solution.swift
@@ -0,0 +1,12 @@
+class Solution {
+    func minCost(_ costs: [[Int]]) -> Int {
+        var r = 0, g = 0, b = 0
+        for cost in costs {
+            let _r = r, _g = g, _b = b
+            r = min(_g, _b) + cost[0]
+            g = min(_r, _b) + cost[1]
+            b = min(_r, _g) + cost[2]
+        }
+        return min(r, min(g, b))
+    }
+}
