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 30, 2026 09:38 | 3,152 | 59,499,371 | 34,675,000 | 0 | 2,277,376 | ||
| 2 | Mar 30, 2026 09:40 | 3,152 | 60,222,860 | 33,654,000 | 1,019,000 | 2,400,256 | ||
| 3 | Mar 30, 2026 09:37 | 3,154 | 66,026,117 | 34,696,000 | 0 | 2,408,448 | ||
| 4 | Mar 30, 2026 09:31 | 3,154 | 63,044,622 | 33,669,000 | 1,020,000 | 2,277,376 | ||
| 5 | Mar 30, 2026 09:28 | 3,156 | 61,938,111 | 34,715,000 | 0 | 2,277,376 | ||
| 6 | Mar 30, 2026 09:32 | 3,156 | 69,618,712 | 34,716,000 | 0 | 2,396,160 | ||
| 7 | Mar 30, 2026 09:29 | 3,158 | 57,485,844 | 32,749,000 | 1,984,000 | 2,400,256 | ||
| 8 | Mar 30, 2026 09:37 | 3,163 | 67,648,709 | 33,795,000 | 993,000 | 2,277,376 | ||
| 9 | Mar 30, 2026 09:33 | 3,166 | 62,409,983 | 34,829,000 | 0 | 2,277,376 | ||
| 10 | Mar 30, 2026 09:30 | 3,167 | 59,458,941 | 34,841,000 | 0 | 2,404,352 | ||
| 11 | Mar 30, 2026 09:34 | 3,167 | 57,974,640 | 33,838,000 | 995,000 | 2,277,376 | ||
| 12 | Mar 30, 2026 09:36 | 3,167 | 61,858,434 | 32,851,000 | 1,990,000 | 2,277,376 | ||
| 13 | Mar 30, 2026 09:38 | 3,167 | 61,409,007 | 32,842,000 | 1,990,000 | 2,277,376 | ||
| 14 | Mar 30, 2026 09:29 | 3,167 | 61,623,713 | 33,844,000 | 995,000 | 2,277,376 | ||
| 15 | Mar 30, 2026 09:36 | 3,167 | 64,005,229 | 32,848,000 | 1,990,000 | 2,277,376 | ||
| 16 | Mar 30, 2026 09:30 | 3,167 | 61,597,716 | 32,843,000 | 1,990,000 | 2,396,160 | ||
| 17 | Mar 30, 2026 09:35 | 3,168 | 63,601,300 | 33,855,000 | 995,000 | 2,404,352 | ||
| 18 | Mar 30, 2026 09:35 | 3,168 | 58,430,506 | 33,848,000 | 995,000 | 2,408,448 | ||
| 19 | Mar 30, 2026 09:35 | 3,168 | 60,697,189 | 32,854,000 | 1,991,000 | 2,277,376 | ||
| 20 | Mar 30, 2026 09:34 | 3,168 | 57,754,512 | 33,848,000 | 995,000 | 2,277,376 | ||
| 21 | Mar 30, 2026 09:35 | 3,168 | 63,751,115 | 33,852,000 | 995,000 | 2,404,352 | ||
| 22 | Mar 30, 2026 09:40 | 3,168 | 66,470,105 | 32,861,000 | 1,991,000 | 2,400,256 | ||
| 23 | Mar 30, 2026 09:37 | 3,168 | 63,518,649 | 32,857,000 | 1,991,000 | 2,400,256 | ||
| 24 | Mar 30, 2026 09:41 | 3,168 | 59,960,855 | 33,853,000 | 995,000 | 2,277,376 | ||
| 25 | Mar 30, 2026 09:32 | 3,168 | 65,824,191 | 33,856,000 | 995,000 | 2,400,256 | ||
| 26 | Mar 30, 2026 09:33 | 3,169 | 65,641,240 | 33,866,000 | 996,000 | 2,396,160 | ||
| 27 | Mar 30, 2026 09:37 | 3,169 | 64,869,960 | 33,859,000 | 995,000 | 2,277,376 | ||
| 28 | Mar 30, 2026 09:32 | 3,169 | 58,733,211 | 33,868,000 | 996,000 | 2,277,376 | ||
| 29 | Mar 30, 2026 09:39 | 3,169 | 65,154,534 | 32,867,000 | 1,991,000 | 2,277,376 | ||
| 30 | Mar 30, 2026 09:37 | 3,170 | 61,732,671 | 34,870,000 | 0 | 2,396,160 | ||
| 31 | Mar 30, 2026 09:35 | 3,170 | 62,539,527 | 34,871,000 | 0 | 2,400,256 | ||
| 32 | Mar 30, 2026 09:33 | 3,171 | 60,249,373 | 32,892,000 | 1,993,000 | 2,277,376 | ||
| 33 | Mar 30, 2026 09:33 | 3,172 | 57,889,169 | 34,896,000 | 0 | 2,396,160 | ||
| 34 | Mar 30, 2026 09:39 | 3,174 | 56,655,415 | 32,916,000 | 1,994,000 | 2,273,280 | ||
| 35 | Mar 30, 2026 09:28 | 3,175 | 56,959,962 | 33,932,000 | 998,000 | 2,277,376 | ||
| 36 | Mar 30, 2026 09:40 | 3,175 | 58,122,014 | 33,924,000 | 997,000 | 2,277,376 | ||
| 37 | Mar 30, 2026 09:35 | 3,175 | 62,049,012 | 33,928,000 | 997,000 | 2,408,448 | ||
| 38 | Mar 30, 2026 09:33 | 3,175 | 59,678,533 | 32,927,000 | 1,995,000 | 2,400,256 | ||
| 39 | Mar 30, 2026 09:34 | 3,176 | 56,423,141 | 33,936,000 | 998,000 | 2,273,280 | ||
| 40 | Mar 30, 2026 09:30 | 3,176 | 62,259,456 | 33,943,000 | 998,000 | 2,396,160 | ||
| 41 | Mar 30, 2026 09:31 | 3,176 | 57,866,931 | 33,934,000 | 998,000 | 2,277,376 | ||
| 42 | Mar 30, 2026 09:32 | 3,176 | 57,673,097 | 32,938,000 | 1,996,000 | 2,277,376 | ||
| 43 | Mar 30, 2026 09:31 | 3,177 | 61,274,085 | 32,954,000 | 1,997,000 | 2,277,376 | ||
| 44 | Mar 30, 2026 09:30 | 3,177 | 59,230,355 | 33,953,000 | 998,000 | 2,404,352 | ||
| 45 | Mar 30, 2026 09:30 | 3,177 | 57,780,829 | 33,948,000 | 998,000 | 2,396,160 | ||
| 46 | Mar 30, 2026 09:28 | 3,177 | 58,757,947 | 32,946,000 | 1,996,000 | 2,277,376 | ||
| 47 | Mar 30, 2026 09:32 | 3,178 | 54,694,035 | 33,965,000 | 998,000 | 2,400,256 | ||
| 48 | Mar 30, 2026 09:36 | 3,178 | 58,423,345 | 33,965,000 | 998,000 | 2,396,160 | ||
| 49 | Mar 30, 2026 09:39 | 3,178 | 60,342,664 | 33,957,000 | 998,000 | 2,277,376 | ||
| 50 | Mar 30, 2026 09:29 | 3,179 | 59,454,512 | 33,975,000 | 999,000 | 2,387,968 | ||
| 51 | Mar 30, 2026 09:33 | 3,180 | 63,158,887 | 32,979,000 | 1,998,000 | 2,277,376 | ||
| 52 | Mar 30, 2026 09:38 | 3,180 | 59,265,670 | 33,979,000 | 999,000 | 2,396,160 | ||
| 53 | Mar 30, 2026 09:30 | 3,180 | 61,713,045 | 33,980,000 | 999,000 | 2,277,376 | ||
| 54 | Mar 30, 2026 09:41 | 3,180 | 61,604,356 | 32,981,000 | 1,998,000 | 2,277,376 | ||
| 55 | Mar 30, 2026 09:37 | 3,181 | 56,440,835 | 32,996,000 | 1,999,000 | 2,277,376 | ||
| 56 | Mar 30, 2026 09:41 | 3,182 | 57,882,227 | 34,002,000 | 1,000,000 | 2,277,376 | ||
| 57 | Mar 30, 2026 09:32 | 3,186 | 55,750,856 | 33,043,000 | 2,002,000 | 2,404,352 |