diff --git a/lcci/16.22.Langtons Ant/README.md b/lcci/16.22.Langtons Ant/README.md
index 17d70e3e552fc..e66c8e52c7af1 100644
--- a/lcci/16.22.Langtons Ant/README.md	
+++ b/lcci/16.22.Langtons Ant/README.md	
@@ -206,6 +206,50 @@ func printKMoves(K int) []string {
 }
 ```
 
+```swift
+class Solution {
+    func printKMoves(_ K: Int) -> [String] {
+        var x1 = 0, y1 = 0, x2 = 0, y2 = 0
+        let dirs = [0, 1, 0, -1, 0]
+        let d = "RDLU"
+        var x = 0, y = 0, p = 0
+        var black = Set<[Int]>()
+        var K = K
+
+        while K > 0 {
+            let t = [x, y]
+            if black.insert(t).inserted {
+                p = (p + 1) % 4
+            } else {
+                black.remove(t)
+                p = (p + 3) % 4
+            }
+            x += dirs[p]
+            y += dirs[p + 1]
+            x1 = min(x1, x)
+            y1 = min(y1, y)
+            x2 = max(x2, x)
+            y2 = max(y2, y)
+            K -= 1
+        }
+
+        let m = x2 - x1 + 1
+        let n = y2 - y1 + 1
+        var g = Array(repeating: Array(repeating: "_", count: n), count: m)
+
+        for t in black {
+            let i = t[0] - x1
+            let j = t[1] - y1
+            g[i][j] = "X"
+        }
+
+        g[x - x1][y - y1] = String(d[d.index(d.startIndex, offsetBy: p)])
+
+        return g.map { $0.joined() }
+    }
+}
+```
+
 <!-- tabs:end -->
 
 <!-- end -->
diff --git a/lcci/16.22.Langtons Ant/README_EN.md b/lcci/16.22.Langtons Ant/README_EN.md
index 28448219478b4..fb1623540676b 100644
--- a/lcci/16.22.Langtons Ant/README_EN.md	
+++ b/lcci/16.22.Langtons Ant/README_EN.md	
@@ -226,6 +226,50 @@ func printKMoves(K int) []string {
 }
 ```
 
+```swift
+class Solution {
+    func printKMoves(_ K: Int) -> [String] {
+        var x1 = 0, y1 = 0, x2 = 0, y2 = 0
+        let dirs = [0, 1, 0, -1, 0]
+        let d = "RDLU"
+        var x = 0, y = 0, p = 0
+        var black = Set<[Int]>()
+        var K = K
+
+        while K > 0 {
+            let t = [x, y]
+            if black.insert(t).inserted {
+                p = (p + 1) % 4
+            } else {
+                black.remove(t)
+                p = (p + 3) % 4
+            }
+            x += dirs[p]
+            y += dirs[p + 1]
+            x1 = min(x1, x)
+            y1 = min(y1, y)
+            x2 = max(x2, x)
+            y2 = max(y2, y)
+            K -= 1
+        }
+
+        let m = x2 - x1 + 1
+        let n = y2 - y1 + 1
+        var g = Array(repeating: Array(repeating: "_", count: n), count: m)
+
+        for t in black {
+            let i = t[0] - x1
+            let j = t[1] - y1
+            g[i][j] = "X"
+        }
+
+        g[x - x1][y - y1] = String(d[d.index(d.startIndex, offsetBy: p)])
+
+        return g.map { $0.joined() }
+    }
+}
+```
+
 <!-- tabs:end -->
 
 <!-- end -->
diff --git a/lcci/16.22.Langtons Ant/Solution.swift b/lcci/16.22.Langtons Ant/Solution.swift
new file mode 100644
index 0000000000000..bab48138ff747
--- /dev/null
+++ b/lcci/16.22.Langtons Ant/Solution.swift	
@@ -0,0 +1,41 @@
+class Solution {
+    func printKMoves(_ K: Int) -> [String] {
+        var x1 = 0, y1 = 0, x2 = 0, y2 = 0
+        let dirs = [0, 1, 0, -1, 0]
+        let d = "RDLU"
+        var x = 0, y = 0, p = 0
+        var black = Set<[Int]>()
+        var K = K
+        
+        while K > 0 {
+            let t = [x, y]
+            if black.insert(t).inserted {
+                p = (p + 1) % 4
+            } else {
+                black.remove(t)
+                p = (p + 3) % 4
+            }
+            x += dirs[p]
+            y += dirs[p + 1]
+            x1 = min(x1, x)
+            y1 = min(y1, y)
+            x2 = max(x2, x)
+            y2 = max(y2, y)
+            K -= 1
+        }
+        
+        let m = x2 - x1 + 1
+        let n = y2 - y1 + 1
+        var g = Array(repeating: Array(repeating: "_", count: n), count: m)
+        
+        for t in black {
+            let i = t[0] - x1
+            let j = t[1] - y1
+            g[i][j] = "X"
+        }
+        
+        g[x - x1][y - y1] = String(d[d.index(d.startIndex, offsetBy: p)])
+        
+        return g.map { $0.joined() }
+    }
+}
\ No newline at end of file