[Solved] In the following code snippet for forming the largest number, which line... In the following code snippet for forming the largest number, which line causes incorrect output when the input is [0, 0]? | Greedy Algorithms

Greedy Algorithms - Largest Number (Arrange to Form Biggest)

In the following code snippet for forming the largest number, which line causes incorrect output when the input is [0, 0]?

1: nums = [0, 0]
2: nums_str = list(map(str, nums))
3: nums_str.sort()
4: result = ''.join(nums_str)
5: return result

ALine 2: Incorrect string conversion

BLine 3: Sorting without custom comparator

CLine 4: Joining without separator

DLine 5: Returning result without conversion

Step-by-Step Solution

Solution:

Step 1: Identify sorting method
Line 3 sorts strings lexicographically ascending by default.
Step 2: Problem with default sort
Default sort does not use custom comparator needed to form largest number.
Step 3: Effect on input [0, 0]
Sorting default keeps order but joining results in "00" instead of "0".
Step 4: Correct fix
Use custom comparator and handle leading zeros to return "0".
Final Answer:
Option B -> Option B
Quick Check:
Default sort fails on multiple zeros [OK]

Quick Trick: Default sort misses custom comparator for largest number [OK]

Common Mistakes:

MISTAKES

Trap Explanation:

PITFALL

Interviewer Note:

CONTEXT

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More Greedy Algorithms Quizzes

In the following code snippet for forming the largest number, which line causes incorrect output when the input is [0, 0]?