What is the optimal time complexity of solving Replace all 0’s with 1 in a given integer?

The optimized solution achieves a time complexity of O(n) by using sorting, mathematical shortcuts, or hash table lookups.

What is the auxiliary space complexity for Replace all 0’s with 1 in a given integer?

The space complexity is O(1) since we only use a minimal/constant amount of extra memory for tracking variables (or auxiliary space if dynamic structures are allocated).

What are the typical edge cases we must handle in Replace all 0’s with 1 in a given integer?

Key edge cases include empty collections, negative or large bounds causing integer overflow, arrays with only one element, or inputs where target criteria are not met.

How can we optimize the brute force approach for Replace all 0’s with 1 in a given integer?

Brute force methods often inspect all possible combinations. We optimize this by sorting the input list to enable binary search, or tracking processed items in a set to avoid redundant nested loop lookups.

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Replace all 0’s with 1 in a given integer

Learn how to solve the 'Replace all 0’s with 1 in a given integer' problem. This detailed resource details brute force and optimized approaches.

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Problem Statement

Easy

Write a function replace_zeros(n) that takes a positive integer n and returns a new integer where every digit '0' in n has been replaced with '1'.

For example, if n = 102030, the result should be 112131 (each 0 becomes 1).

Constraints

•1 <= n <= 10^9

Examples

Example 1

Input

replace_zeros(102030)

Output

Explanation

The digits of 102030 are 1,0,2,0,3,0. Replacing each 0 with 1 gives 1,1,2,1,3,1 = 112131.

Example 2

Input

replace_zeros(1000)

Output

Explanation

1,0,0,0 becomes 1,1,1,1 = 1111.

Example 3

Input

replace_zeros(123)

Output

Explanation

No zeros in 123, so it remains unchanged.

Need a Hint?

Use simple arithmetic operators (like modulo `%`, division `//`), conditional checks, or loops to inspect number properties.

Edge Cases to Watch

Empty list or null input variables
Single item lists/arrays
Extremely large input bounds causing integer or stack overflow

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