Minimum Operations to Make the Array Increasing LeetCode solution in Python

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class Solution:
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    def minOperations(self, nums: List[int]) -> int:
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        sol = 0
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        last = nums[0]
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        for i in range(len(nums) - 1):
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            if last >= nums[i + 1]:
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                sol += last - nums[i + 1] + 1
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                last = last + 1
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            else:
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                last = nums[i + 1]
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        return sol