Binary Watch
Explore how to use backtracking to solve the binary watch problem, generating all possible times given a number of LEDs on. Learn to handle constraints such as valid time formats and efficient exploration of combinations to develop a strong approach to similar coding interview problems.
We'll cover the following...
We'll cover the following...
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. ...