LeetCode 1256: Encode Number Solution
Master LeetCode problem 1256 (Encode Number), a medium challenge, with our optimized solutions in Java, C++, and Python. Explore detailed explanations, test your code in our interactive editor, and prepare for coding interviews.
1256. Encode Number
Problem Explanation
Explanation:
To encode a positive integer, we can convert it to its binary representation and then drop the leading '1'. The encoded result is the binary representation of the original number without the leading '1'.
Algorithmic Idea:
- Convert the given number to its binary representation.
- Remove the first character ('1') from the binary representation.
- Return the resulting binary representation.
Example:
Input: num = 23 Binary representation of 23: 10111 Encoded binary representation: 0111
Time Complexity:
The time complexity of this algorithm is O(log n) where n is the given number.
Space Complexity:
The space complexity of this algorithm is O(log n) for storing the binary representation.
: :
Solution Code
class Solution {
public String encode(int num) {
return Integer.toBinaryString(num + 1).substring(1);
}
}Try It Yourself
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What is the time complexity of LeetCode 1256 (Encode Number)?
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