Calculate Daily Spending

📝 Description

Sum all transactions for each day from a list.

Input Format

[{"date": str (YYYY-MM-DD), "amount": float}]

Output Format

{"date": str, "total": float} (per day)

Constraints

1 ≤ transactions ≤ 10^5, 0 < amount ≤ 10^6

🔍 Sample Input

[{"date": "2023-01-01", "amount": 100}, {"date": "2023-01-01", "amount": 200}]
            

✅ Sample Output

{"2023-01-01": 300}