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class Solution:
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    def arrayChange(self, nums: List[int], operations: List[List[int]]) -> List[int]:
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        replacements = {}
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        for x, y in reversed(operations):
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            replacements[x] = replacements.get(y, y)
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        for idx, val in enumerate(nums):
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            if val in replacements:
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                nums[idx] = replacements[val]
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        return nums