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 3, 2021 00:38Yuriy LyfenkoYuriy LyfenkoError
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Run Statistics
#DateScoreWall TimeCPU UserCPU SystemMemoryError
1May 3, 2021 00:3800000Wrong answer: expected: 402745241 got: 3}]4+64 6}]6+18 3}]8+435 9}]5+841 5}]0+9 6}]5+80 0}]4+73 5}]9+4 2}]8+03 7}]0+58 5}]5+3 1}]4+781 3}]6+71 2}]9+31 9}]8+41 6}]7+8 2}]7+629 4}]6+2 0}]3+91 9}]5+862 9}]6+49 7}]5+60 7}]2+609 0}]9+71 5}]3+968 5}]6+42 8...