Parse JSON 
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.canceledisfalseor absent
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Run Statistics
| # | Date | Score | Wall Time | CPU User | CPU System | Memory | Error | |
|---|---|---|---|---|---|---|---|---|
| 1 | Mar 27, 2026 03:31 | 3,130 | 58,591,704 | 34,435,000 | 0 | 2,400,256 | ||
| 2 | Mar 27, 2026 03:31 | 3,136 | 57,935,423 | 33,481,000 | 1,014,000 | 2,400,256 | ||
| 3 | Mar 27, 2026 03:31 | 3,137 | 60,388,478 | 34,508,000 | 0 | 2,277,376 | ||
| 4 | Mar 27, 2026 03:31 | 3,139 | 63,196,726 | 33,513,000 | 1,015,000 | 2,277,376 | ||
| 5 | Mar 27, 2026 03:31 | 3,139 | 55,419,481 | 33,518,000 | 1,015,000 | 2,277,376 | ||
| 6 | Mar 27, 2026 03:31 | 3,140 | 59,299,654 | 33,529,000 | 1,016,000 | 2,400,256 | ||
| 7 | Mar 27, 2026 03:31 | 3,140 | 59,501,219 | 34,535,000 | 0 | 2,400,256 | ||
| 8 | Mar 27, 2026 03:31 | 3,142 | 54,649,647 | 33,541,000 | 1,016,000 | 2,396,160 | ||
| 9 | Mar 27, 2026 03:33 | 3,143 | 55,832,469 | 33,557,000 | 1,016,000 | 2,392,064 | ||
| 10 | Mar 27, 2026 03:33 | 3,144 | 64,193,399 | 34,588,000 | 0 | 2,404,352 | ||
| 11 | Mar 27, 2026 03:33 | 3,145 | 64,939,577 | 33,575,000 | 1,017,000 | 2,277,376 | ||
| 12 | Mar 27, 2026 03:31 | 3,145 | 63,931,655 | 33,574,000 | 1,017,000 | 2,396,160 | ||
| 13 | Mar 27, 2026 03:31 | 3,145 | 64,097,408 | 33,580,000 | 1,017,000 | 2,392,064 | ||
| 14 | Mar 27, 2026 03:31 | 3,145 | 64,800,855 | 33,581,000 | 1,017,000 | 2,277,376 | ||
| 15 | Mar 27, 2026 03:33 | 3,146 | 63,430,582 | 34,610,000 | 0 | 2,400,256 | ||
| 16 | Mar 27, 2026 03:33 | 3,146 | 64,784,411 | 33,591,000 | 1,017,000 | 2,400,256 | ||
| 17 | Mar 27, 2026 03:33 | 3,146 | 62,718,378 | 34,601,000 | 0 | 2,387,968 | ||
| 18 | Mar 27, 2026 03:33 | 3,146 | 65,757,790 | 33,592,000 | 1,017,000 | 2,277,376 | ||
| 19 | Mar 27, 2026 03:31 | 3,146 | 63,620,271 | 34,603,000 | 0 | 2,510,848 | ||
| 20 | Mar 27, 2026 03:31 | 3,146 | 62,253,387 | 34,605,000 | 0 | 2,281,472 | ||
| 21 | Mar 27, 2026 03:33 | 3,147 | 63,982,509 | 33,603,000 | 1,018,000 | 2,387,968 | ||
| 22 | Mar 27, 2026 03:31 | 3,147 | 62,527,898 | 33,598,000 | 1,018,000 | 2,277,376 | ||
| 23 | Mar 27, 2026 03:31 | 3,148 | 61,994,812 | 33,613,000 | 1,018,000 | 2,392,064 | ||
| 24 | Mar 27, 2026 03:31 | 3,148 | 62,306,082 | 33,605,000 | 1,018,000 | 2,404,352 | ||
| 25 | Mar 27, 2026 03:33 | 3,149 | 60,119,840 | 34,636,000 | 0 | 2,486,272 | ||
| 26 | Mar 27, 2026 03:31 | 3,149 | 65,181,071 | 34,643,000 | 0 | 2,392,064 | ||
| 27 | Mar 27, 2026 03:33 | 3,149 | 58,957,710 | 33,626,000 | 1,018,000 | 2,396,160 | ||
| 28 | Mar 27, 2026 03:31 | 3,149 | 60,768,393 | 34,635,000 | 0 | 2,277,376 | ||
| 29 | Mar 27, 2026 03:33 | 3,150 | 72,539,018 | 34,653,000 | 0 | 2,400,256 | ||
| 30 | Mar 27, 2026 03:31 | 3,151 | 64,678,808 | 34,660,000 | 0 | 2,277,376 | ||
| 31 | Mar 27, 2026 03:31 | 3,152 | 59,088,823 | 33,651,000 | 1,019,000 | 2,277,376 | ||
| 32 | Mar 27, 2026 03:31 | 3,153 | 59,151,393 | 34,678,000 | 0 | 2,281,472 | ||
| 33 | Mar 27, 2026 03:33 | 3,153 | 66,125,960 | 34,680,000 | 0 | 2,514,944 | ||
| 34 | Mar 27, 2026 03:33 | 3,153 | 67,344,250 | 34,687,000 | 0 | 2,400,256 | ||
| 35 | Mar 27, 2026 03:31 | 3,154 | 62,091,038 | 33,678,000 | 1,020,000 | 2,404,352 | ||
| 36 | Mar 27, 2026 03:33 | 3,167 | 66,241,432 | 33,843,000 | 995,000 | 2,277,376 | ||
| 37 | Mar 27, 2026 03:33 | 3,167 | 67,092,051 | 32,845,000 | 1,990,000 | 2,277,376 | ||
| 38 | Mar 27, 2026 03:31 | 3,168 | 64,279,442 | 32,858,000 | 1,991,000 | 2,277,376 | ||
| 39 | Mar 27, 2026 03:31 | 3,168 | 64,289,618 | 33,849,000 | 995,000 | 2,396,160 | ||
| 40 | Mar 27, 2026 03:33 | 3,168 | 60,613,167 | 32,862,000 | 1,991,000 | 2,392,064 | ||
| 41 | Mar 27, 2026 03:33 | 3,168 | 58,059,344 | 32,858,000 | 1,991,000 | 2,400,256 | ||
| 42 | Mar 27, 2026 03:31 | 3,169 | 57,804,734 | 34,864,000 | 0 | 2,277,376 | ||
| 43 | Mar 27, 2026 03:33 | 3,169 | 67,574,448 | 32,867,000 | 1,991,000 | 2,277,376 | ||
| 44 | Mar 27, 2026 03:33 | 3,169 | 59,114,254 | 33,862,000 | 995,000 | 2,404,352 | ||
| 45 | Mar 27, 2026 03:33 | 3,169 | 61,641,124 | 32,869,000 | 1,992,000 | 2,277,376 | ||
| 46 | Mar 27, 2026 03:33 | 3,170 | 59,831,053 | 33,869,000 | 996,000 | 2,277,376 | ||
| 47 | Mar 27, 2026 03:33 | 3,170 | 60,894,088 | 32,880,000 | 1,992,000 | 2,400,256 | ||
| 48 | Mar 27, 2026 03:31 | 3,171 | 59,202,882 | 32,885,000 | 1,993,000 | 2,277,376 | ||
| 49 | Mar 27, 2026 03:33 | 3,175 | 56,822,006 | 32,931,000 | 1,995,000 | 2,396,160 | ||
| 50 | Mar 27, 2026 03:33 | 3,177 | 62,963,412 | 33,944,000 | 998,000 | 2,408,448 | ||
| 51 | Mar 27, 2026 03:31 | 3,180 | 60,814,225 | 33,985,000 | 999,000 | 2,387,968 |