Bit Manipulation - Power of Two
You need to determine if a given integer is a power of two. Which algorithmic pattern best fits this problem?
You need to determine if a given integer is a power of two. Which algorithmic pattern best fits this problem?
easy🔍 Pattern Recognition Q1 of Q15
Step-by-Step Solution
Solution:
Step 1: Understand the problem requirement
The problem asks to check if a number is a power of two, which is a classic bit manipulation problem.Step 2: Identify the pattern
The pattern that efficiently solves this is using the property that powers of two have exactly one set bit, and n & (n - 1) clears the lowest set bit.Final Answer:
Option A -> Option AQuick Check:
Bit manipulation is optimal for power-of-two checks [OK]
Quick Trick: Use n & (n - 1) to check power of two [OK]
Common Mistakes:
MISTAKES- Confusing with DP or graph algorithms
- Using loops unnecessarily
Trap Explanation:
PITFALL- Candidates often pick DP or graph patterns because they are common, but bit manipulation is optimal here.
Interviewer Note:
CONTEXT- Tests candidate's ability to recognize bit manipulation patterns quickly.
Master "Power of Two" in Bit Manipulation
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