# 1436. Destination City

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  1 2 3 4 5 6 7 8 9 10 11 12 13 14 class Solution: def destCity(self, paths: List[List[str]]) -> str: count = Counter() for a, b in paths: count[a] += 1 for a, b in paths: if b in count: count[b] -= 1 if count[b] == 0: del count[b] else: return b