Package g0401_0500.s0401_binary_watch

Class Solution

java.lang.Object
g0401_0500.s0401_binary_watch.Solution
public class Solution extends java.lang.Object
401 - Binary Watch.

Easy

A binary watch has 4 LEDs on the top which represent the hours (0-11), and the 6 LEDs on the bottom 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, 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

  • Constructor Summary

    Constructors
    Constructor
    Description
    Solution()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    java.util.List<java.lang.String>
    readBinaryWatch(int turnedOn)
     

    Methods inherited from class java.lang.Object

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

  • Constructor Details

    • Solution

      public Solution()

  • Method Details

    • readBinaryWatch

      public java.util.List<java.lang.String> readBinaryWatch(int turnedOn)