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 13:15 | 3,150 | 68,454,804 | 33,630,000 | 1,019,000 | 2,408,448 | ||
| 2 | Mar 30, 2026 13:16 | 3,151 | 59,606,445 | 33,645,000 | 1,019,000 | 2,396,160 | ||
| 3 | Mar 30, 2026 13:06 | 3,152 | 66,439,669 | 34,675,000 | 0 | 2,277,376 | ||
| 4 | Mar 30, 2026 13:09 | 3,152 | 60,649,593 | 33,657,000 | 1,019,000 | 2,396,160 | ||
| 5 | Mar 30, 2026 13:18 | 3,153 | 61,379,334 | 33,662,000 | 1,020,000 | 2,277,376 | ||
| 6 | Mar 30, 2026 13:09 | 3,153 | 65,407,991 | 33,668,000 | 1,020,000 | 2,392,064 | ||
| 7 | Mar 30, 2026 13:19 | 3,155 | 61,978,119 | 33,715,000 | 991,000 | 2,396,160 | ||
| 8 | Mar 30, 2026 13:14 | 3,156 | 59,704,306 | 34,717,000 | 0 | 2,277,376 | ||
| 9 | Mar 30, 2026 13:12 | 3,164 | 65,105,748 | 32,811,000 | 1,988,000 | 2,281,472 | ||
| 10 | Mar 30, 2026 13:18 | 3,167 | 65,906,729 | 34,837,000 | 0 | 2,277,376 | ||
| 11 | Mar 30, 2026 13:18 | 3,167 | 61,821,657 | 34,836,000 | 0 | 2,277,376 | ||
| 12 | Mar 30, 2026 13:17 | 3,168 | 61,385,975 | 33,849,000 | 995,000 | 2,277,376 | ||
| 13 | Mar 30, 2026 13:17 | 3,168 | 60,162,329 | 33,849,000 | 995,000 | 2,494,464 | ||
| 14 | Mar 30, 2026 13:13 | 3,168 | 61,495,951 | 33,848,000 | 995,000 | 2,396,160 | ||
| 15 | Mar 30, 2026 13:11 | 3,168 | 63,949,143 | 33,857,000 | 995,000 | 2,277,376 | ||
| 16 | Mar 30, 2026 13:11 | 3,168 | 62,094,629 | 33,849,000 | 995,000 | 2,273,280 | ||
| 17 | Mar 30, 2026 13:06 | 3,168 | 62,137,878 | 33,856,000 | 995,000 | 2,396,160 | ||
| 18 | Mar 30, 2026 13:06 | 3,168 | 62,434,647 | 33,848,000 | 995,000 | 2,281,472 | ||
| 19 | Mar 30, 2026 13:06 | 3,168 | 65,913,916 | 33,852,000 | 995,000 | 2,404,352 | ||
| 20 | Mar 30, 2026 13:10 | 3,169 | 59,051,503 | 32,865,000 | 1,991,000 | 2,396,160 | ||
| 21 | Mar 30, 2026 13:19 | 3,169 | 65,421,390 | 32,867,000 | 1,991,000 | 2,408,448 | ||
| 22 | Mar 30, 2026 13:09 | 3,169 | 64,370,037 | 32,866,000 | 1,991,000 | 2,277,376 | ||
| 23 | Mar 30, 2026 13:16 | 3,169 | 62,010,308 | 34,856,000 | 0 | 2,392,064 | ||
| 24 | Mar 30, 2026 13:15 | 3,169 | 61,141,517 | 32,863,000 | 1,991,000 | 2,277,376 | ||
| 25 | Mar 30, 2026 13:08 | 3,169 | 62,600,482 | 33,864,000 | 996,000 | 2,396,160 | ||
| 26 | Mar 30, 2026 13:07 | 3,170 | 60,773,127 | 34,867,000 | 0 | 2,396,160 | ||
| 27 | Mar 30, 2026 13:18 | 3,170 | 59,429,364 | 33,877,000 | 996,000 | 2,387,968 | ||
| 28 | Mar 30, 2026 13:16 | 3,170 | 64,385,891 | 33,872,000 | 996,000 | 2,277,376 | ||
| 29 | Mar 30, 2026 13:08 | 3,170 | 62,782,227 | 33,872,000 | 996,000 | 2,387,968 | ||
| 30 | Mar 30, 2026 13:07 | 3,171 | 62,166,393 | 33,881,000 | 996,000 | 2,277,376 | ||
| 31 | Mar 30, 2026 13:09 | 3,171 | 58,323,841 | 32,885,000 | 1,993,000 | 2,277,376 | ||
| 32 | Mar 30, 2026 13:14 | 3,173 | 57,401,980 | 33,903,000 | 997,000 | 2,277,376 | ||
| 33 | Mar 30, 2026 13:18 | 3,173 | 58,653,391 | 32,905,000 | 1,994,000 | 2,277,376 | ||
| 34 | Mar 30, 2026 13:14 | 3,173 | 58,200,180 | 33,908,000 | 997,000 | 2,408,448 | ||
| 35 | Mar 30, 2026 13:12 | 3,174 | 55,256,122 | 32,922,000 | 1,995,000 | 2,408,448 | ||
| 36 | Mar 30, 2026 13:06 | 3,174 | 58,760,267 | 33,913,000 | 997,000 | 2,277,376 | ||
| 37 | Mar 30, 2026 13:06 | 3,175 | 57,881,674 | 32,934,000 | 1,996,000 | 2,400,256 | ||
| 38 | Mar 30, 2026 13:18 | 3,177 | 56,857,956 | 32,953,000 | 1,997,000 | 2,277,376 | ||
| 39 | Mar 30, 2026 13:16 | 3,177 | 57,303,193 | 33,946,000 | 998,000 | 2,396,160 | ||
| 40 | Mar 30, 2026 13:16 | 3,177 | 59,410,999 | 32,955,000 | 1,997,000 | 2,392,064 | ||
| 41 | Mar 30, 2026 13:16 | 3,177 | 58,354,219 | 32,951,000 | 1,997,000 | 2,277,376 | ||
| 42 | Mar 30, 2026 13:09 | 3,177 | 57,919,383 | 33,947,000 | 998,000 | 2,404,352 | ||
| 43 | Mar 30, 2026 13:13 | 3,179 | 57,400,303 | 32,968,000 | 1,998,000 | 2,273,280 | ||
| 44 | Mar 30, 2026 13:07 | 3,181 | 61,361,788 | 33,995,000 | 999,000 | 2,400,256 | ||
| 45 | Mar 30, 2026 13:17 | 3,181 | 60,983,131 | 32,990,000 | 1,999,000 | 2,277,376 | ||
| 46 | Mar 30, 2026 13:19 | 3,183 | 60,848,854 | 34,012,000 | 1,000,000 | 2,277,376 | ||
| 47 | Mar 30, 2026 13:13 | 3,184 | 58,250,578 | 33,019,000 | 2,001,000 | 2,277,376 | ||
| 48 | Mar 30, 2026 13:11 | 3,184 | 62,430,550 | 34,024,000 | 1,000,000 | 2,396,160 | ||
| 49 | Mar 30, 2026 13:10 | 3,184 | 60,034,194 | 33,024,000 | 2,001,000 | 2,387,968 | ||
| 50 | Mar 30, 2026 13:15 | 3,186 | 58,051,671 | 34,050,000 | 1,001,000 | 2,396,160 | ||
| 51 | Mar 30, 2026 13:08 | 3,186 | 57,927,946 | 33,044,000 | 2,002,000 | 2,400,256 | ||
| 52 | Mar 30, 2026 13:10 | 3,187 | 61,805,363 | 34,052,000 | 1,001,000 | 2,277,376 | ||
| 53 | Mar 30, 2026 13:09 | 3,187 | 58,023,642 | 32,057,000 | 3,005,000 | 2,273,280 | ||
| 54 | Mar 30, 2026 13:12 | 3,190 | 63,717,246 | 34,088,000 | 1,002,000 | 2,396,160 |