g0401_0500.s0401_binary_watch

Class Solution

java.lang.Object

g0401_0500.s0401_binary_watch.Solution

public class Solution
extends 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 and Description
Solution()

Method Summary

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

Methods inherited from class java.lang.Object

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

Constructor Detail

Solution

public Solution()

Method Detail

readBinaryWatch

public List<String> readBinaryWatch(int turnedOn)