168. Plus One

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Plus One Magic Adventure!

Magic Number Boxes

9

Current Magic Spell (Code)

function plusOne(digits: number[]): number[] {

Story Time

Imagine we have the number 99, but each digit lives in its own magic box! Our mission: Add 1 to the whole number.

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Variables

digits[9, 9]

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Example 1:

Input: digits = [1,2,3]

Output: [1,2,4]

Explanation: The array represents 123. Incrementing by one gives 124. The last digit 3 becomes 4.

Example 2:

Input: digits = [4,3,2,1]

Output: [4,3,2,2]

Explanation: The array represents 4321. Incrementing by one gives 4322. The last digit 1 becomes 2.

Example 3:

Input: digits = [9]

Output: [1,0]

Explanation: The array represents 9. Incrementing by one gives 10. The 9 becomes 0 with a carry, and a new leading 1 is added.

Example 4:

Input: digits = [9,9]

Output: [1,0,0]

Explanation: The array represents 99. Incrementing by one gives 100. Both 9s become 0 with carries, and a new leading 1 is added.

Example 5:

Input: digits = [1,9]

Output: [2,0]

Explanation: The array represents 19. Incrementing by one gives 20. The last digit 9 becomes 0, carrying 1 to the first digit, making it 2.

Constraints:

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Time Complexity

O(N)

Space Complexity

O(N)

168. Plus One

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Visualize This Problem

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Example 5:

Constraints:

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168. Plus One

Understand Before Coding

Plus One Magic Adventure!

Magic Number Boxes

Current Magic Spell (Code)

Story Time

Variables

Visualize This Problem

Draw Your Approach

Example 1:

Example 2:

Example 3:

Example 4:

Example 5:

Constraints:

Learn

Topics

Companies

Hint

Use Cases

Plus One Magic Adventure!

Magic Number Boxes

Current Magic Spell (Code)

Story Time

Variables