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Grokking the Coding Interview Patterns in Go

Solution: Base 7

Understand how to convert any integer into base 7 by applying repeated division and remainder collection. Learn to handle negative values and zero correctly, optimize for time and space complexity, and produce the proper base 7 string representation.

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Statement

Given an integer num, return a string representing its base 77 equivalent.

Constraints:

  • −107≤-10^7 \leq num ≤107\leq 10^7

Solution

The core idea behind this problem is standard base conversion using repeated division. To convert a decimal integer to its base 77 representation, we repeatedly divide the number by 7 ...