Merge pull request neetcode-gh#1222 from sxsmg/1980-Find-Unique-Binary-String

Create 1980-Find-Unique-Binary-String.py

Author: Ahmad-A0

python/1980-Find-Unique-Binary-String.py

@@ -0,0 +1,19 @@
+class Solution:
+    def findDifferentBinaryString(self, nums: List[str]) -> str:
+        
+        strSet = { s for s in nums }
+        
+        def backtrack(i, cur):
+            if i == len(nums):
+                res = "".join(cur)
+                return None if res in strSet else res
+            
+            res = backtrack(i+1, cur)
+            if res: return res
+            
+            cur[i] = "1"
+            res = backtrack(i+1, cur)
+            if res: return res
+            
+        return backtrack(0, ["0" for s in nums])
+