Search⌘ K
AI Features

Solution: Confusing Number

Explore how to identify confusing numbers by simulating a 180-degree rotation of digits. Learn to map valid digits, reverse their order, and compare results efficiently. This lesson helps you implement the logic with O(log n) time and constant space complexity, improving your problem-solving skills for coding interviews.

Statement

A confusing number is a number that, when rotated 180 degrees, produces a valid yet different number.

Digits can be rotated 180180 degrees according to the following rules:

  • The digits 00 ...