Create 0997-find-the-town-judge.py

Author: a93a

python/0997-find-the-town-judge.py

@@ -0,0 +1,12 @@
+class Solution:
+    def findJudge(self, n: int, trust: List[List[int]]) -> int:
+        delta = defaultdict(int)
+
+        for src, dst in trust:
+            delta[src] -= 1
+            delta[dst] += 1
+
+        for i in range(1, n + 1):
+            if delta[i] == n - 1:
+                return i
+        return -1