Package g0401_0500.s0401_binary_watch

Class Solution

  • All Implemented Interfaces:
    
public final class Solution

    401 - Binary Watch\.

    Easy

    A binary watch has 4 LEDs on the top to represent the hours (0-11), and 6 LEDs on the bottom to represent the minutes (0-59). Each LED represents a zero or one, with the least significant bit on the right.

    • For example, the below binary watch reads "4:51".

    Given an integer turnedOn which represents the number of LEDs that are currently on (ignoring the PM), return all possible times the watch could represent. You may return the answer in any order.

    The hour must not contain a leading zero.

    • For example, "01:00" is not valid. It should be "1:00".

    The minute must be consist of two digits and may contain a leading zero.

    • For example, "10:2" is not valid. It should be "10:02".

    Example 1:

    Input: turnedOn = 1

    Output: "0:01","0:02","0:04","0:08","0:16","0:32","1:00","2:00","4:00","8:00"

    Example 2:

    Input: turnedOn = 9

    Output: []

    Constraints:

    • 0 <= turnedOn <= 10

    • Nested Class Summary

      Nested Classes 
      Modifier and Type Class Description

    • Field Summary

      Fields 
      Modifier and Type Field Description

    • Constructor Summary

      Constructors 
      Constructor Description
      Solution()

    • Enum Constant Summary

      Enum Constants 
      Enum Constant Description

    • Method Summary

      Modifier and Type Method Description
      final List<String> readBinaryWatch(Integer turnedOn)

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait