[Solved] Identify the error in this pseudocode snippet for simplifying debts: for person in net_balances: if net_balances[person] > 0: for debtor in net_balances: if net_balances[debtor] | LLD

LLD - Design — Splitwise (Expense Sharing)

Identify the error in this pseudocode snippet for simplifying debts:

for person in net_balances:
  if net_balances[person] > 0:
    for debtor in net_balances:
      if net_balances[debtor] < 0:
        net_balances[person] -= net_balances[debtor]
        net_balances[debtor] = 0

AIt misses updating the debtor's balance after payment

BIt incorrectly subtracts negative values, increasing the creditor's balance

CIt loops over the same dictionary twice unnecessarily

DIt does not reset creditor's balance to zero after transactions

Step-by-Step Solution

Solution:

Step 1: Analyze subtraction of negative values
Subtracting a negative number increases the creditor's balance incorrectly.
Step 2: Identify correct operation
The code should add the debtor's absolute value or subtract the positive amount owed.
Final Answer:
It incorrectly subtracts negative values, increasing the creditor's balance -> Option B
Quick Check:
Subtracting negative = Incorrect balance update [OK]

Quick Trick: Subtracting negatives adds value; use absolute values instead [OK]

Common Mistakes:

Ignoring sign when updating balances
Not resetting balances properly
Confusing creditor and debtor roles

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More LLD Quizzes

Identify the error in this pseudocode snippet for simplifying debts:

Step 1: Analyze subtraction of negative values

Step 2: Identify correct operation

Final Answer:

Quick Check:

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