How to Solve Maximum 69 Number Problem
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Maximum 69 Number
You are given a positive integer num consisting only of digits 6 and 9. Return the maximum number you can get by changing at most one digit (6 becomes 9, and 9 becomes 6).
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Understanding the Maximum 69 Number Problem
Let's break down this LeetCode problem and understand what makes it challenging in interview settings.
Problem Statement
You are given a positive integer num consisting only of digits 6 and 9. Return the maximum number you can get by changing at most one digit (6 becomes 9, and 9 becomes 6).
Maximum 69 Number
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Examples
num = 96699969Changing the first digit results in 6669. Changing the second digit results in 9969. Changing the third digit results in 9699. Changing the fourth digit results in 9666. The maximum number is 9969.
num = 99969999Changing the last digit 6 to 9 results in the maximum number.
num = 99999999It is better not to apply any change.
Constraints
1 <= num <= 104num consists of only 6 and 9 digits.How Interview Coder Helps with Leetcode Problems
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Frequently Asked Questions
Common questions about solving Maximum 69 Number and using Interview Coder during coding interviews.
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