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

<ul>
	<li>For example, the below binary watch reads <code>&quot;4:51&quot;</code>.</li>
</ul>

<p><img alt="" src="https://assets.leetcode.com/uploads/2021/04/08/binarywatch.jpg" style="width: 500px; height: 500px;" /></p>

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

<p>The hour must not contain a leading zero.</p>

<ul>
	<li>For example, <code>&quot;01:00&quot;</code> is not valid. It should be <code>&quot;1:00&quot;</code>.</li>
</ul>

<p>The minute must&nbsp;consist of two digits and may contain a leading zero.</p>

<ul>
	<li>For example, <code>&quot;10:2&quot;</code> is not valid. It should be <code>&quot;10:02&quot;</code>.</li>
</ul>

<p>&nbsp;</p>
<p><strong class="example">Example 1:</strong></p>
<pre><strong>Input:</strong> turnedOn = 1
<strong>Output:</strong> ["0:01","0:02","0:04","0:08","0:16","0:32","1:00","2:00","4:00","8:00"]
</pre><p><strong class="example">Example 2:</strong></p>
<pre><strong>Input:</strong> turnedOn = 9
<strong>Output:</strong> []
</pre>
<p>&nbsp;</p>
<p><strong>Constraints:</strong></p>

<ul>
	<li><code>0 &lt;= turnedOn &lt;= 10</code></li>
</ul>

class Solution {
public:
    vector<string> readBinaryWatch(int turnedOn) {
        switch (turnedOn){
            case 0:
                return {"0:00"};
                break;
            case 1:
                return {"0:01","0:02","0:04","0:08","0:16","0:32","1:00","2:00","4:00","8:00"};
                break;
            case 2:
                return {"0:03","0:05","0:06","0:09","0:10","0:12","0:17","0:18","0:20","0:24","0:33","0:34","0:36","0:40","0:48","1:01","1:02","1:04","1:08","1:16","1:32","2:01","2:02","2:04","2:08","2:16","2:32","3:00","4:01","4:02","4:04","4:08","4:16","4:32","5:00","6:00","8:01","8:02","8:04","8:08","8:16","8:32","9:00","10:00"};
                break;
            case 3:
                return {"0:07","0:11","0:13","0:14","0:19","0:21","0:22","0:25","0:26","0:28","0:35","0:37","0:38","0:41","0:42","0:44","0:49","0:50","0:52","0:56","1:03","1:05","1:06","1:09","1:10","1:12","1:17","1:18","1:20","1:24","1:33","1:34","1:36","1:40","1:48","2:03","2:05","2:06","2:09","2:10","2:12","2:17","2:18","2:20","2:24","2:33","2:34","2:36","2:40","2:48","3:01","3:02","3:04","3:08","3:16","3:32","4:03","4:05","4:06","4:09","4:10","4:12","4:17","4:18","4:20","4:24","4:33","4:34","4:36","4:40","4:48","5:01","5:02","5:04","5:08","5:16","5:32","6:01","6:02","6:04","6:08","6:16","6:32","7:00","8:03","8:05","8:06","8:09","8:10","8:12","8:17","8:18","8:20","8:24","8:33","8:34","8:36","8:40","8:48","9:01","9:02","9:04","9:08","9:16","9:32","10:01","10:02","10:04","10:08","10:16","10:32","11:00"};
                break;
            case 4:
                return {"0:15","0:23","0:27","0:29","0:30","0:39","0:43","0:45","0:46","0:51","0:53","0:54","0:57","0:58","1:07","1:11","1:13","1:14","1:19","1:21","1:22","1:25","1:26","1:28","1:35","1:37","1:38","1:41","1:42","1:44","1:49","1:50","1:52","1:56","2:07","2:11","2:13","2:14","2:19","2:21","2:22","2:25","2:26","2:28","2:35","2:37","2:38","2:41","2:42","2:44","2:49","2:50","2:52","2:56","3:03","3:05","3:06","3:09","3:10","3:12","3:17","3:18","3:20","3:24","3:33","3:34","3:36","3:40","3:48","4:07","4:11","4:13","4:14","4:19","4:21","4:22","4:25","4:26","4:28","4:35","4:37","4:38","4:41","4:42","4:44","4:49","4:50","4:52","4:56","5:03","5:05","5:06","5:09","5:10","5:12","5:17","5:18","5:20","5:24","5:33","5:34","5:36","5:40","5:48","6:03","6:05","6:06","6:09","6:10","6:12","6:17","6:18","6:20","6:24","6:33","6:34","6:36","6:40","6:48","7:01","7:02","7:04","7:08","7:16","7:32","8:07","8:11","8:13","8:14","8:19","8:21","8:22","8:25","8:26","8:28","8:35","8:37","8:38","8:41","8:42","8:44","8:49","8:50","8:52","8:56","9:03","9:05","9:06","9:09","9:10","9:12","9:17","9:18","9:20","9:24","9:33","9:34","9:36","9:40","9:48","10:03","10:05","10:06","10:09","10:10","10:12","10:17","10:18","10:20","10:24","10:33","10:34","10:36","10:40","10:48","11:01","11:02","11:04","11:08","11:16","11:32"};
                break;
            case 5:
                return {"0:31","0:47","0:55","0:59","1:15","1:23","1:27","1:29","1:30","1:39","1:43","1:45","1:46","1:51","1:53","1:54","1:57","1:58","2:15","2:23","2:27","2:29","2:30","2:39","2:43","2:45","2:46","2:51","2:53","2:54","2:57","2:58","3:07","3:11","3:13","3:14","3:19","3:21","3:22","3:25","3:26","3:28","3:35","3:37","3:38","3:41","3:42","3:44","3:49","3:50","3:52","3:56","4:15","4:23","4:27","4:29","4:30","4:39","4:43","4:45","4:46","4:51","4:53","4:54","4:57","4:58","5:07","5:11","5:13","5:14","5:19","5:21","5:22","5:25","5:26","5:28","5:35","5:37","5:38","5:41","5:42","5:44","5:49","5:50","5:52","5:56","6:07","6:11","6:13","6:14","6:19","6:21","6:22","6:25","6:26","6:28","6:35","6:37","6:38","6:41","6:42","6:44","6:49","6:50","6:52","6:56","7:03","7:05","7:06","7:09","7:10","7:12","7:17","7:18","7:20","7:24","7:33","7:34","7:36","7:40","7:48","8:15","8:23","8:27","8:29","8:30","8:39","8:43","8:45","8:46","8:51","8:53","8:54","8:57","8:58","9:07","9:11","9:13","9:14","9:19","9:21","9:22","9:25","9:26","9:28","9:35","9:37","9:38","9:41","9:42","9:44","9:49","9:50","9:52","9:56","10:07","10:11","10:13","10:14","10:19","10:21","10:22","10:25","10:26","10:28","10:35","10:37","10:38","10:41","10:42","10:44","10:49","10:50","10:52","10:56","11:03","11:05","11:06","11:09","11:10","11:12","11:17","11:18","11:20","11:24","11:33","11:34","11:36","11:40","11:48"};
                break;
            case 6:
                return {"1:31","1:47","1:55","1:59","2:31","2:47","2:55","2:59","3:15","3:23","3:27","3:29","3:30","3:39","3:43","3:45","3:46","3:51","3:53","3:54","3:57","3:58","4:31","4:47","4:55","4:59","5:15","5:23","5:27","5:29","5:30","5:39","5:43","5:45","5:46","5:51","5:53","5:54","5:57","5:58","6:15","6:23","6:27","6:29","6:30","6:39","6:43","6:45","6:46","6:51","6:53","6:54","6:57","6:58","7:07","7:11","7:13","7:14","7:19","7:21","7:22","7:25","7:26","7:28","7:35","7:37","7:38","7:41","7:42","7:44","7:49","7:50","7:52","7:56","8:31","8:47","8:55","8:59","9:15","9:23","9:27","9:29","9:30","9:39","9:43","9:45","9:46","9:51","9:53","9:54","9:57","9:58","10:15","10:23","10:27","10:29","10:30","10:39","10:43","10:45","10:46","10:51","10:53","10:54","10:57","10:58","11:07","11:11","11:13","11:14","11:19","11:21","11:22","11:25","11:26","11:28","11:35","11:37","11:38","11:41","11:42","11:44","11:49","11:50","11:52","11:56"};
                break;
            case 7:
                return {"3:31","3:47","3:55","3:59","5:31","5:47","5:55","5:59","6:31","6:47","6:55","6:59","7:15","7:23","7:27","7:29","7:30","7:39","7:43","7:45","7:46","7:51","7:53","7:54","7:57","7:58","9:31","9:47","9:55","9:59","10:31","10:47","10:55","10:59","11:15","11:23","11:27","11:29","11:30","11:39","11:43","11:45","11:46","11:51","11:53","11:54","11:57","11:58"};
                break;
            case 8:
                return {"7:31","7:47","7:55","7:59","11:31","11:47","11:55","11:59"};
                break;
        }
        return {};

    }
};
8400