diff --git a/NeetCodeRoadmap/Arrays_and_Hashing/66_Plus_One.py b/NeetCodeRoadmap/Arrays_and_Hashing/66_Plus_One.py
new file mode 100644
index 0000000..5694f1c
--- /dev/null
+++ b/NeetCodeRoadmap/Arrays_and_Hashing/66_Plus_One.py
@@ -0,0 +1,22 @@
+def plusOne(digits):
+    zeros = 0
+    if digits[-1] == 9:
+        if len(digits) < 2:
+            digits[-1] = 1
+            digits.append(0)
+            return digits
+        for i in range(len(digits)):
+            if digits[i] == 9:
+                zeros += 1
+                if digits[i-1] == 9:
+                    digits[i] = 0
+                else:
+                    digits[i] = 1
+                    break
+        digits.append(0)
+    else:
+        digits[-1] = digits[-1] + 1
+    return digits
+
+
+print(plusOne([1,2,3]))
\ No newline at end of file