How do you solve Convert Date to Binary on LeetCode?

Convert Date to Binary (LeetCode #3280) can be solved using Brute Force or Optimal Solution. The optimal approach is Optimal Solution with O(n) time complexity and O(n) space complexity. Key insight: Binary representation is a direct conversion of decimal numbers.

What is the brute force solution for Convert Date to Binary?

The brute force approach for Convert Date to Binary is Brute Force, with O(n) time complexity and O(1) space complexity. The brute-force approach involves splitting the date string into its components (year, month, day) and converting each component to its binary representation. This is straightforward but not the most efficient way to handle the conversion. The optimal Optimal Solution approach improves this to O(n).

What algorithm or data structure is used to solve Convert Date to Binary?

Convert Date to Binary uses the following concepts: Math, String. The recommended patterns to study are: String Manipulation, Array.

What are the interview tips for Convert Date to Binary?

Clearly explain your thought process as you break down the problem. Consider edge cases, such as the minimum and maximum values for year, month, and day. Practice converting numbers to binary manually to understand the process better.

What are common mistakes when solving Convert Date to Binary?

Forgetting to strip the '0b' prefix from binary strings. Not handling leading zeros in month and day correctly.

#3280

Convert Date to Binary

Easy

MathStringString ManipulationArray

LeetCode ↗

Approaches

Brute ForceOptimal

Complexity Comparison

	Brute Force	Optimal Solution★
Time	O(n)	O(n)
Space	O(1)	O(n)

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Intuition

Time O(n)Space O(n)

The optimal solution is similar to the brute force but focuses on using efficient string manipulation and built-in functions to minimize overhead. This approach is efficient and clear.

⚙️

Algorithm

3 steps

1Step 1: Split the input date string by the '-' character to separate year, month, and day.
2Step 2: Use a list comprehension to convert each component to binary, stripping the '0b' prefix.
3Step 3: Join the binary strings with '-' in between to form the final output.

solution.py3 lines

1def dateToBinary(date):
2    year, month, day = date.split('-')
3    return '-'.join(bin(int(x))[2:] for x in [year, month, day])

ℹ

Complexity note: The time complexity remains O(n) as we still process each character of the date string. The space complexity is O(n) because we create a new string for the output.

1Binary representation is a direct conversion of decimal numbers.
2String manipulation can be efficiently handled with built-in functions.

Solutions and explanations are original Tejav content. Problem titles © LeetCode — use the LeetCode button above for the full problem statement.