solve problem

Author: delight010

sum-of-two-integers/delight010.swift

@@ -0,0 +1,18 @@
+class Solution {
+    // Time O(log n)
+    // Space O(1)
+    func getSum(_ a: Int, _ b: Int) -> Int {
+        var a = a
+        var b = b
+        
+        while b != 0 {
+            var sum = a ^ b
+            var carry = (a & b) << 1
+            a = sum
+            b = carry
+        }
+        
+        return a
+    }
+}
+