What is the time complexity of Replace Elements in an Array?

The optimal solution for Replace Elements in an Array runs in undefined time and uses undefined space. undefined

What algorithm or data structure is used to solve Replace Elements in an Array?

Replace Elements in an Array uses the following concepts: Array, Hash Table, Simulation. The recommended patterns to study are: .

#2295

Replace Elements in an Array

Medium

ArrayHash TableSimulation

LeetCode ↗

Approaches

💡

Intuition

Time Space

In the brute-force approach, we will iterate through the operations and for each operation, we will find the index of the element to replace in the nums array. This is simple but inefficient because we may need to search through the array multiple times.

⚙️

Algorithm

3 steps

1Step 1: For each operation in operations, find the index of operations[i][0] in nums.
2Step 2: Replace nums[index] with operations[i][1].
3Step 3: Repeat for all operations.

solution.py7 lines

1# Full working Python code
2nums = [1, 2, 4, 6]
3operations = [[1, 3], [4, 7], [6, 1]]
4for old, new in operations:
5    index = nums.index(old)
6    nums[index] = new
7print(nums)

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