add github page10

Author: boudhayan

Algorithm Solutions In Swift/main.swift

@@ -1,7 +1,12 @@
 import Foundation
 
-
-
-
-var array = [3, 4, 5, 1, 2]
-
+func singleNumber1(_ nums: [Int]) -> Int {
+    var x = nums[0]
+    for i in 1..<nums.count {
+        x = x^nums[i]
+    }
+    return x
+}
+
+var array = [2,2,1]//[0,0,1,1,1,2,2,3,3,4]
+print(singleNumber1(array))