Bit Manipulation - Single Number II (Three Copies)
Which of the following problems CANNOT be solved efficiently using the Single Number II (Three Copies) bit manipulation pattern?
Which of the following problems CANNOT be solved efficiently using the Single Number II (Three Copies) bit manipulation pattern?
easy🔍 Pattern Recognition Q2 of Q15
Step-by-Step Solution
Solution:
Step 1: Analyze problem constraints
The Single Number II pattern specifically handles elements repeated exactly three times except one unique element.Step 2: Identify which problem breaks the pattern
Find the element that appears once when all others appear exactly five times involves five times repetition, which requires a different modulo approach, not the triple-based FSM.Final Answer:
Option C -> Option CQuick Check:
Only triple repetition fits the Single Number II pattern exactly [OK]
Quick Trick: Single Number II pattern only fits triple repetition [OK]
Common Mistakes:
MISTAKES- Confusing double repetition with triple
- Assuming pattern works for any k-times repetition
Trap Explanation:
PITFALL- Candidates often think the triple repetition pattern generalizes to other repetition counts, which it does not.
Interviewer Note:
CONTEXT- Checks candidate's understanding of pattern applicability and limitations.
Master "Single Number II (Three Copies)" in Bit Manipulation
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