Package g1301_1400.s1323_maximum_69_number

Class Solution

java.lang.Object

g1301_1400.s1323_maximum_69_number.Solution

public class Solution
extends Object

1323 - Maximum 69 Number.<p>Easy</p> <p>You are given a positive integer <code>num</code> consisting only of digits <code>6</code> and <code>9</code>.</p> <p>Return <em>the maximum number you can get by changing <strong>at most</strong> one digit (</em><code>6</code> <em>becomes</em> <code>9</code><em>, and</em> <code>9</code> <em>becomes</em> <code>6</code><em>)</em>.</p> <p><strong>Example 1:</strong></p> <p><strong>Input:</strong> num = 9669</p> <p><strong>Output:</strong> 9969</p> <p><strong>Explanation:</strong></p> <p>Changing the first digit results in 6669.</p> <p>Changing the second digit results in 9969.</p> <p>Changing the third digit results in 9699.</p> <p>Changing the fourth digit results in 9666.</p> <p>The maximum number is 9969.</p> <p><strong>Example 2:</strong></p> <p><strong>Input:</strong> num = 9996</p> <p><strong>Output:</strong> 9999</p> <p><strong>Explanation:</strong> Changing the last digit 6 to 9 results in the maximum number.</p> <p><strong>Example 3:</strong></p> <p><strong>Input:</strong> num = 9999</p> <p><strong>Output:</strong> 9999</p> <p><strong>Explanation:</strong> It is better not to apply any change.</p> <p><strong>Constraints:</strong></p> <ul> <li><code>1 <= num <= 10⁴</code></li> <li><code>num</code> consists of only <code>6</code> and <code>9</code> digits.</li> </ul>

Constructor Summary

Constructors

Constructor	Description
Solution()

Method Summary

Modifier and Type	Method	Description
int	maximum69Number(int num)

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

maximum69Number

public int maximum69Number(int num)