036. Minimum Operations to Make the Array Increasing.py

#Minimum Operations to Make the Array Increasing
"""
You are given an integer array nums (0-indexed). In one operation, you can choose an element of the array and increment it by 1.

For example, if nums = [1,2,3], you can choose to increment nums[1] to make nums = [1,3,3].
Return the minimum number of operations needed to make nums strictly increasing.

An array nums is strictly increasing if nums[i] < nums[i+1] for all 0 <= i < nums.length - 1. An array of length 1 is trivially strictly increasing.

 

Example 1:

Input: nums = [1,1,1]
Output: 3
Explanation: You can do the following operations:
1) Increment nums[2], so nums becomes [1,1,2].
2) Increment nums[1], so nums becomes [1,2,2].
3) Increment nums[2], so nums becomes [1,2,3].
"""

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