LLD - Design — Splitwise (Expense Sharing)
Given the transactions [+100, -50, +25] and initial balance 200, what is the final balance after applying the balance calculation algorithm?
Given the transactions [+100, -50, +25] and initial balance 200, what is the final balance after applying the balance calculation algorithm?
medium📝 Analysis Q4 of 15
Step-by-Step Solution
Solution:
Step 1: Sum the transactions
Calculate total transactions: 100 - 50 + 25 = 75.Step 2: Add to initial balance
Initial balance 200 + 75 = 275 final balance.Final Answer:
275 -> Option DQuick Check:
Final balance = 275 [OK]
Quick Trick: Add all transactions to initial balance [OK]
Common Mistakes:
- Subtracting instead of adding transactions
- Ignoring negative signs
- Adding only first transaction
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