diff --git a/371-Sum-of-Two-Integers.py b/371-Sum-of-Two-Integers.py
new file mode 100644
index 000000000..476bfe662
--- /dev/null
+++ b/371-Sum-of-Two-Integers.py
@@ -0,0 +1,16 @@
+class Solution:
+    def getSum(self, a: int, b: int) -> int:
+        def add(a, b): 
+            if not a or not b:
+                return a or b
+            return add(a^b, (a&b) << 1)
+
+        if a*b < 0: # assume a < 0, b > 0
+            if a > 0:
+                return self.getSum(b, a)
+            if add(~a, 1) == b: # -a == b
+                return 0
+            if add(~a, 1) < b: # -a < b
+                return add(~add(add(~a, 1), add(~b, 1)),1) # -add(-a, -b)
+
+        return add(a, b) # a*b >= 0 or (-a) > b > 0