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 29, 2026 21:18 | 3,149 | 62,076,985 | 33,619,000 | 1,018,000 | 2,400,256 | ||
| 2 | Mar 29, 2026 21:28 | 3,149 | 58,123,120 | 34,643,000 | 0 | 2,277,376 | ||
| 3 | Mar 29, 2026 21:31 | 3,150 | 62,901,122 | 33,636,000 | 1,019,000 | 2,277,376 | ||
| 4 | Mar 29, 2026 21:18 | 3,151 | 64,740,050 | 33,641,000 | 1,019,000 | 2,277,376 | ||
| 5 | Mar 29, 2026 21:21 | 3,151 | 60,033,333 | 34,663,000 | 0 | 2,396,160 | ||
| 6 | Mar 29, 2026 21:19 | 3,151 | 62,004,388 | 34,656,000 | 0 | 2,277,376 | ||
| 7 | Mar 29, 2026 21:29 | 3,151 | 60,133,597 | 33,637,000 | 1,019,000 | 2,400,256 | ||
| 8 | Mar 29, 2026 21:24 | 3,153 | 66,437,448 | 34,681,000 | 0 | 2,277,376 | ||
| 9 | Mar 29, 2026 21:28 | 3,153 | 62,847,848 | 34,686,000 | 0 | 2,396,160 | ||
| 10 | Mar 29, 2026 21:28 | 3,155 | 65,679,223 | 34,701,000 | 0 | 2,277,376 | ||
| 11 | Mar 29, 2026 21:19 | 3,156 | 61,661,498 | 33,697,000 | 1,021,000 | 2,396,160 | ||
| 12 | Mar 29, 2026 21:28 | 3,158 | 60,139,312 | 33,715,000 | 1,021,000 | 2,396,160 | ||
| 13 | Mar 29, 2026 21:21 | 3,158 | 61,879,740 | 33,714,000 | 1,021,000 | 2,277,376 | ||
| 14 | Mar 29, 2026 21:28 | 3,164 | 61,009,104 | 32,814,000 | 1,988,000 | 2,277,376 | ||
| 15 | Mar 29, 2026 21:24 | 3,164 | 60,569,737 | 33,813,000 | 994,000 | 2,400,256 | ||
| 16 | Mar 29, 2026 21:19 | 3,167 | 60,640,088 | 32,845,000 | 1,990,000 | 2,277,376 | ||
| 17 | Mar 29, 2026 21:20 | 3,167 | 63,492,236 | 34,838,000 | 0 | 2,400,256 | ||
| 18 | Mar 29, 2026 21:23 | 3,167 | 64,928,176 | 33,846,000 | 995,000 | 2,277,376 | ||
| 19 | Mar 29, 2026 21:30 | 3,168 | 60,908,405 | 34,848,000 | 0 | 2,277,376 | ||
| 20 | Mar 29, 2026 21:30 | 3,168 | 67,767,061 | 33,853,000 | 995,000 | 2,277,376 | ||
| 21 | Mar 29, 2026 21:19 | 3,168 | 64,839,178 | 33,856,000 | 995,000 | 2,277,376 | ||
| 22 | Mar 29, 2026 21:27 | 3,168 | 65,884,843 | 32,853,000 | 1,991,000 | 2,392,064 | ||
| 23 | Mar 29, 2026 21:24 | 3,168 | 61,031,228 | 33,857,000 | 995,000 | 2,392,064 | ||
| 24 | Mar 29, 2026 21:24 | 3,168 | 59,796,820 | 33,849,000 | 995,000 | 2,277,376 | ||
| 25 | Mar 29, 2026 21:31 | 3,168 | 60,017,007 | 33,850,000 | 995,000 | 2,277,376 | ||
| 26 | Mar 29, 2026 21:24 | 3,168 | 64,016,682 | 33,851,000 | 995,000 | 2,392,064 | ||
| 27 | Mar 29, 2026 21:24 | 3,168 | 59,708,026 | 32,852,000 | 1,991,000 | 2,277,376 | ||
| 28 | Mar 29, 2026 21:30 | 3,168 | 70,271,259 | 32,853,000 | 1,991,000 | 2,277,376 | ||
| 29 | Mar 29, 2026 21:18 | 3,169 | 58,308,383 | 32,868,000 | 1,992,000 | 2,498,560 | ||
| 30 | Mar 29, 2026 21:23 | 3,169 | 64,015,942 | 33,862,000 | 995,000 | 2,392,064 | ||
| 31 | Mar 29, 2026 21:18 | 3,169 | 63,706,254 | 33,863,000 | 995,000 | 2,277,376 | ||
| 32 | Mar 29, 2026 21:21 | 3,169 | 58,659,823 | 33,866,000 | 996,000 | 2,277,376 | ||
| 33 | Mar 29, 2026 21:21 | 3,169 | 66,013,537 | 32,864,000 | 1,991,000 | 2,400,256 | ||
| 34 | Mar 29, 2026 21:21 | 3,169 | 64,822,165 | 32,867,000 | 1,991,000 | 2,396,160 | ||
| 35 | Mar 29, 2026 21:22 | 3,169 | 63,672,752 | 32,865,000 | 1,991,000 | 2,277,376 | ||
| 36 | Mar 29, 2026 21:22 | 3,169 | 60,679,812 | 33,860,000 | 995,000 | 2,277,376 | ||
| 37 | Mar 29, 2026 21:31 | 3,170 | 69,643,023 | 34,873,000 | 0 | 2,277,376 | ||
| 38 | Mar 29, 2026 21:19 | 3,171 | 62,506,323 | 32,887,000 | 1,993,000 | 2,277,376 | ||
| 39 | Mar 29, 2026 21:30 | 3,173 | 61,401,389 | 33,905,000 | 997,000 | 2,277,376 | ||
| 40 | Mar 29, 2026 21:30 | 3,173 | 64,158,581 | 33,910,000 | 997,000 | 2,277,376 | ||
| 41 | Mar 29, 2026 21:23 | 3,173 | 57,936,688 | 32,912,000 | 1,994,000 | 2,277,376 | ||
| 42 | Mar 29, 2026 21:18 | 3,173 | 57,882,015 | 32,909,000 | 1,994,000 | 2,400,256 | ||
| 43 | Mar 29, 2026 21:31 | 3,174 | 58,389,165 | 33,919,000 | 997,000 | 2,277,376 | ||
| 44 | Mar 29, 2026 21:27 | 3,174 | 62,063,710 | 33,918,000 | 997,000 | 2,494,464 | ||
| 45 | Mar 29, 2026 21:22 | 3,174 | 59,759,923 | 33,919,000 | 997,000 | 2,396,160 | ||
| 46 | Mar 29, 2026 21:22 | 3,175 | 62,755,132 | 33,928,000 | 997,000 | 2,277,376 | ||
| 47 | Mar 29, 2026 21:18 | 3,177 | 60,401,425 | 32,948,000 | 1,996,000 | 2,277,376 | ||
| 48 | Mar 29, 2026 21:21 | 3,177 | 56,714,772 | 32,952,000 | 1,997,000 | 2,404,352 | ||
| 49 | Mar 29, 2026 21:31 | 3,178 | 57,151,895 | 32,958,000 | 1,997,000 | 2,400,256 | ||
| 50 | Mar 29, 2026 21:20 | 3,180 | 61,640,849 | 33,976,000 | 999,000 | 2,277,376 | ||
| 51 | Mar 29, 2026 21:22 | 3,180 | 62,724,409 | 33,986,000 | 999,000 | 2,277,376 | ||
| 52 | Mar 29, 2026 21:20 | 3,181 | 61,433,056 | 32,990,000 | 1,999,000 | 2,277,376 | ||
| 53 | Mar 29, 2026 21:29 | 3,183 | 60,210,575 | 33,013,000 | 2,000,000 | 2,400,256 | ||
| 54 | Mar 29, 2026 21:22 | 3,183 | 60,173,188 | 34,013,000 | 1,000,000 | 2,277,376 | ||
| 55 | Mar 29, 2026 21:29 | 3,184 | 62,439,553 | 33,024,000 | 2,001,000 | 2,273,280 | ||
| 56 | Mar 29, 2026 21:28 | 3,184 | 60,350,831 | 34,024,000 | 1,000,000 | 2,277,376 | ||
| 57 | Mar 29, 2026 21:30 | 3,185 | 62,322,336 | 33,030,000 | 2,001,000 | 2,277,376 | ||
| 58 | Mar 29, 2026 21:27 | 3,185 | 57,970,268 | 34,033,000 | 1,000,000 | 2,277,376 | ||
| 59 | Mar 29, 2026 21:31 | 3,186 | 57,332,957 | 34,047,000 | 1,001,000 | 2,277,376 | ||
| 60 | Mar 29, 2026 21:19 | 3,189 | 54,483,908 | 33,078,000 | 2,004,000 | 2,392,064 |