Parse JSON Sergey Svistunov

Compute the total amount of non-canceled external USD transactions from a stream of JSON records as fast as possible.

Input: 1 000 000 JSON records on STDIN, one per line. Each record has the following structure:

{
    "user_id": 0,
    "currency": "USD",
    "transactions": [
        {
            "amount": 0,
            "to_user_id": 0,
            "canceled": false
        }
    ]
}
Field Constraints
user_id Integer, max 10 000
currency One of "GBP", "USD", "RUB", "JPY", "CHF"
transactions Array, max 10 elements
amount Integer, max 1000
canceled Boolean; may be omitted when false

Field order is not guaranteed within any object.

Output: The total amount of all transactions where:

  • record.currency == "USD"
  • transaction.to_user_id != record.user_id (external)
  • transaction.canceled is false or absent
Restrictions:60s512Mb 1 Score Packages
Back to listMay 2, 2021 06:31Yuriy LyfenkoYuriy LyfenkoError
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Run Statistics
#DateScoreWall TimeCPU UserCPU SystemMemoryError
1May 2, 2021 06:3100000Wrong answer: expected: 403654529 got: 55 51 55 50 52 54 57 55 56 56 52 56 57 55 57 53 53 50 55 51 51 48 57 50 48 56 49 57 53 53 50 54 49 51 57 55 56 57 57 48 50 50 53 49 50 57 49 55 49 50 51 49 51 55 54 50 49 49 51 56 53 53 55 50 50 49 52 53 55 51 5...