Greedy Algorithms - Jump Game II (Minimum Jumps)
Examine the following BFS-based code for Jump Game II. Which line contains a subtle bug that can cause incorrect jump counts or infinite loops?
Examine the following BFS-based code for Jump Game II. Which line contains a subtle bug that can cause incorrect jump counts or infinite loops?
medium🐞 Bug Identification Q14 of Q15
Step-by-Step Solution
Step 1: Identify furthest_jump calculation
furthest_jump = pos + nums[pos] can exceed array bounds, causing range() to go out of range or runtime error.Step 2: Check impact
Without min(pos + nums[pos], n - 1), code may attempt invalid indices, causing incorrect behavior or crashes.Final Answer:
Option C -> Option CQuick Check:
Bounding furthest_jump by n-1 prevents out-of-range errors [OK]
Quick Trick: Always bound jump indices within array length [OK]
Common Mistakes:
MISTAKES- Forgetting to limit furthest_jump to n-1
- Incrementing jumps incorrectly
- Missing visited set usage
Trap Explanation:
PITFALL- This bug is subtle because code looks correct but fails on edge cases with large jumps near array end.
Interviewer Note:
CONTEXT- Tests attention to boundary conditions and subtle off-by-one bugs.
Master "Jump Game II (Minimum Jumps)" in Greedy Algorithms
Want More Practice?
15+ quiz questions · All difficulty levels · Free
Free Signup - Practice All QuestionsMore Greedy Algorithms Quizzes