Binary Watch
Explore how to apply the backtracking pattern to solve the binary watch problem in C#. Understand how LEDs encode hours and minutes, and learn to generate all valid times given a number of activated LEDs. This lesson helps build skills in exploring combinatorial solutions efficiently for complex coding interview questions.
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Statement
A binary watch has 4 LEDs for displaying hours (ranging from 0 to 11) and 6 for displaying minutes (ranging from 0 to 59). Each LED can be on (1) or off (0), with the least significant bit on the right. For example, the binary watch below reads “9:22.”
Given an integer enabled, which represents the number of LEDs currently turned on, return all possible times that the watch could display. You may return the answer in any order. ...