Max Chunks To Make Sorted LeetCode solution in Python

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class Solution(object):
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    def maxChunksToSorted(self, arr):
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        n = len(arr)
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        count = 0
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        currentmax = -(2**63)
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        for i in range(0, n):
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            currentmax = max(currentmax, arr[i])
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            if currentmax == i:
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                count += 1
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        return count