Greedy Algorithms - Largest Number (Arrange to Form Biggest)
If the input list contains decimal numbers (e.g., 3.1, 30.14), which approach correctly adapts the largest number formation algorithm?
If the input list contains decimal numbers (e.g., 3.1, 30.14), which approach correctly adapts the largest number formation algorithm?
hard🔁 Follow-up Q10 of Q15
Step-by-Step Solution
Solution:
Step 1: Convert decimals to strings
Decimals can be treated as strings for concatenation comparison.Step 2: Use custom comparator
Compare concatenations xy and yx as strings to decide order.Step 3: Avoid rounding or ignoring decimals
Rounding or ignoring decimals changes values and breaks correctness.Final Answer:
Option C -> Option CQuick Check:
String concatenation comparison works for decimals too [OK]
Quick Trick: Treat decimals as strings and compare concatenations [OK]
Common Mistakes:
MISTAKES- Rounding decimals loses precision
- Sorting numerically ignores concatenation order
- Ignoring decimal parts changes values
Trap Explanation:
PITFALL- Rounding or ignoring decimals seems simpler but breaks correctness.
Interviewer Note:
CONTEXT- Tests ability to extend algorithm to handle decimal inputs correctly.
Master "Largest Number (Arrange to Form Biggest)" in Greedy Algorithms
Want More Practice?
15+ quiz questions · All difficulty levels · Free
Free Signup - Practice All QuestionsMore Greedy Algorithms Quizzes