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 22:32 | 3,145 | 64,550,566 | 33,579,000 | 1,017,000 | 2,396,160 | ||
| 2 | Mar 29, 2026 22:31 | 3,147 | 61,159,261 | 34,614,000 | 0 | 2,277,376 | ||
| 3 | Mar 29, 2026 22:37 | 3,147 | 61,041,444 | 33,600,000 | 1,018,000 | 2,408,448 | ||
| 4 | Mar 29, 2026 22:33 | 3,151 | 59,483,250 | 33,645,000 | 1,019,000 | 2,408,448 | ||
| 5 | Mar 29, 2026 22:36 | 3,154 | 62,084,237 | 33,671,000 | 1,020,000 | 2,277,376 | ||
| 6 | Mar 29, 2026 22:35 | 3,154 | 56,549,731 | 33,700,000 | 991,000 | 2,277,376 | ||
| 7 | Mar 29, 2026 22:42 | 3,155 | 60,964,395 | 33,682,000 | 1,020,000 | 2,277,376 | ||
| 8 | Mar 29, 2026 22:36 | 3,155 | 59,661,843 | 34,708,000 | 0 | 2,392,064 | ||
| 9 | Mar 29, 2026 22:40 | 3,156 | 60,627,483 | 34,715,000 | 0 | 2,277,376 | ||
| 10 | Mar 29, 2026 22:38 | 3,159 | 62,865,853 | 33,729,000 | 1,022,000 | 2,277,376 | ||
| 11 | Mar 29, 2026 22:34 | 3,165 | 59,955,800 | 33,823,000 | 994,000 | 2,387,968 | ||
| 12 | Mar 29, 2026 22:31 | 3,166 | 64,481,667 | 34,831,000 | 0 | 2,277,376 | ||
| 13 | Mar 29, 2026 22:43 | 3,167 | 62,490,758 | 32,847,000 | 1,990,000 | 2,277,376 | ||
| 14 | Mar 29, 2026 22:43 | 3,167 | 60,653,395 | 33,841,000 | 995,000 | 2,277,376 | ||
| 15 | Mar 29, 2026 22:33 | 3,167 | 59,437,773 | 33,843,000 | 995,000 | 2,400,256 | ||
| 16 | Mar 29, 2026 22:37 | 3,167 | 63,657,568 | 33,839,000 | 995,000 | 2,277,376 | ||
| 17 | Mar 29, 2026 22:33 | 3,168 | 59,953,686 | 32,856,000 | 1,991,000 | 2,277,376 | ||
| 18 | Mar 29, 2026 22:39 | 3,168 | 61,020,154 | 33,857,000 | 995,000 | 2,277,376 | ||
| 19 | Mar 29, 2026 22:40 | 3,168 | 62,595,451 | 32,854,000 | 1,991,000 | 2,277,376 | ||
| 20 | Mar 29, 2026 22:38 | 3,168 | 64,764,349 | 33,852,000 | 995,000 | 2,277,376 | ||
| 21 | Mar 29, 2026 22:37 | 3,168 | 58,602,236 | 32,854,000 | 1,991,000 | 2,277,376 | ||
| 22 | Mar 29, 2026 22:41 | 3,168 | 57,795,050 | 32,862,000 | 1,991,000 | 2,494,464 | ||
| 23 | Mar 29, 2026 22:36 | 3,168 | 69,440,483 | 33,857,000 | 995,000 | 2,277,376 | ||
| 24 | Mar 29, 2026 22:32 | 3,168 | 59,272,784 | 32,853,000 | 1,991,000 | 2,510,848 | ||
| 25 | Mar 29, 2026 22:36 | 3,168 | 58,075,301 | 32,859,000 | 1,991,000 | 2,400,256 | ||
| 26 | Mar 29, 2026 22:35 | 3,168 | 60,304,309 | 33,849,000 | 995,000 | 2,396,160 | ||
| 27 | Mar 29, 2026 22:33 | 3,168 | 67,817,670 | 33,853,000 | 995,000 | 2,277,376 | ||
| 28 | Mar 29, 2026 22:34 | 3,168 | 61,556,901 | 33,853,000 | 995,000 | 2,277,376 | ||
| 29 | Mar 29, 2026 22:42 | 3,168 | 62,788,918 | 33,848,000 | 995,000 | 2,277,376 | ||
| 30 | Mar 29, 2026 22:36 | 3,169 | 59,036,226 | 32,864,000 | 1,991,000 | 2,502,656 | ||
| 31 | Mar 29, 2026 22:35 | 3,169 | 60,054,151 | 33,863,000 | 995,000 | 2,396,160 | ||
| 32 | Mar 29, 2026 22:41 | 3,169 | 62,295,856 | 32,864,000 | 1,991,000 | 2,277,376 | ||
| 33 | Mar 29, 2026 22:41 | 3,169 | 63,310,568 | 33,865,000 | 996,000 | 2,277,376 | ||
| 34 | Mar 29, 2026 22:34 | 3,169 | 64,801,886 | 32,866,000 | 1,991,000 | 2,392,064 | ||
| 35 | Mar 29, 2026 22:41 | 3,169 | 59,149,542 | 32,870,000 | 1,992,000 | 2,277,376 | ||
| 36 | Mar 29, 2026 22:39 | 3,169 | 62,728,298 | 32,869,000 | 1,992,000 | 2,277,376 | ||
| 37 | Mar 29, 2026 22:40 | 3,170 | 62,131,367 | 32,875,000 | 1,992,000 | 2,277,376 | ||
| 38 | Mar 29, 2026 22:31 | 3,170 | 59,041,944 | 32,880,000 | 1,992,000 | 2,277,376 | ||
| 39 | Mar 29, 2026 22:32 | 3,171 | 64,122,359 | 33,887,000 | 996,000 | 2,277,376 | ||
| 40 | Mar 29, 2026 22:38 | 3,172 | 71,073,542 | 33,896,000 | 996,000 | 2,392,064 | ||
| 41 | Mar 29, 2026 22:43 | 3,173 | 59,421,759 | 33,911,000 | 997,000 | 2,396,160 | ||
| 42 | Mar 29, 2026 22:42 | 3,173 | 58,640,558 | 32,911,000 | 1,994,000 | 2,277,376 | ||
| 43 | Mar 29, 2026 22:31 | 3,173 | 61,199,303 | 33,909,000 | 997,000 | 2,510,848 | ||
| 44 | Mar 29, 2026 22:36 | 3,173 | 57,861,712 | 32,905,000 | 1,994,000 | 2,277,376 | ||
| 45 | Mar 29, 2026 22:38 | 3,175 | 58,640,853 | 32,925,000 | 1,995,000 | 2,277,376 | ||
| 46 | Mar 29, 2026 22:33 | 3,175 | 59,133,979 | 32,927,000 | 1,995,000 | 2,510,848 | ||
| 47 | Mar 29, 2026 22:31 | 3,175 | 60,322,485 | 33,923,000 | 997,000 | 2,392,064 | ||
| 48 | Mar 29, 2026 22:38 | 3,175 | 63,672,266 | 33,928,000 | 997,000 | 2,277,376 | ||
| 49 | Mar 29, 2026 22:41 | 3,176 | 56,605,728 | 32,939,000 | 1,996,000 | 2,277,376 | ||
| 50 | Mar 29, 2026 22:41 | 3,177 | 55,314,321 | 32,947,000 | 1,996,000 | 2,396,160 | ||
| 51 | Mar 29, 2026 22:34 | 3,177 | 57,649,024 | 33,946,000 | 998,000 | 2,404,352 | ||
| 52 | Mar 29, 2026 22:40 | 3,179 | 57,036,762 | 32,976,000 | 1,998,000 | 2,396,160 | ||
| 53 | Mar 29, 2026 22:34 | 3,180 | 57,971,999 | 32,977,000 | 1,998,000 | 2,277,376 | ||
| 54 | Mar 29, 2026 22:40 | 3,180 | 58,751,649 | 33,982,000 | 999,000 | 2,510,848 | ||
| 55 | Mar 29, 2026 22:31 | 3,180 | 60,296,934 | 32,981,000 | 1,998,000 | 2,277,376 | ||
| 56 | Mar 29, 2026 22:38 | 3,181 | 59,666,507 | 32,989,000 | 1,999,000 | 2,396,160 | ||
| 57 | Mar 29, 2026 22:34 | 3,183 | 62,881,976 | 34,008,000 | 1,000,000 | 2,277,376 | ||
| 58 | Mar 29, 2026 22:33 | 3,184 | 58,914,575 | 35,025,000 | 0 | 2,400,256 | ||
| 59 | Mar 29, 2026 22:40 | 3,185 | 63,946,847 | 33,029,000 | 2,001,000 | 2,277,376 | ||
| 60 | Mar 29, 2026 22:39 | 3,192 | 55,573,730 | 33,103,000 | 2,006,000 | 2,396,160 |