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
Source Code
Source code access is restricted. Log in to request access.
Challenge History
No challenges yet.
Run Statistics
| # | Date | Score | Wall Time | CPU User | CPU System | Memory | Error | |
|---|---|---|---|---|---|---|---|---|
| 1 | Mar 30, 2026 06:52 | 3,144 | 59,127,561 | 33,562,000 | 1,017,000 | 2,277,376 | ||
| 2 | Mar 30, 2026 06:53 | 3,148 | 59,318,956 | 34,624,000 | 0 | 2,277,376 | ||
| 3 | Mar 30, 2026 07:00 | 3,148 | 59,635,091 | 33,607,000 | 1,018,000 | 2,277,376 | ||
| 4 | Mar 30, 2026 06:57 | 3,148 | 63,562,746 | 33,614,000 | 1,018,000 | 2,277,376 | ||
| 5 | Mar 30, 2026 06:55 | 3,149 | 59,345,933 | 33,623,000 | 1,018,000 | 2,400,256 | ||
| 6 | Mar 30, 2026 06:50 | 3,149 | 61,057,707 | 34,636,000 | 0 | 2,277,376 | ||
| 7 | Mar 30, 2026 07:00 | 3,150 | 65,353,940 | 34,647,000 | 0 | 2,396,160 | ||
| 8 | Mar 30, 2026 06:55 | 3,151 | 64,795,310 | 34,656,000 | 0 | 2,400,256 | ||
| 9 | Mar 30, 2026 06:57 | 3,151 | 59,183,271 | 33,640,000 | 1,019,000 | 2,277,376 | ||
| 10 | Mar 30, 2026 06:58 | 3,152 | 62,992,371 | 33,650,000 | 1,019,000 | 2,277,376 | ||
| 11 | Mar 30, 2026 06:50 | 3,153 | 64,417,936 | 33,667,000 | 1,020,000 | 2,400,256 | ||
| 12 | Mar 30, 2026 07:00 | 3,154 | 60,522,383 | 34,690,000 | 0 | 2,400,256 | ||
| 13 | Mar 30, 2026 06:55 | 3,154 | 64,702,655 | 33,670,000 | 1,020,000 | 2,404,352 | ||
| 14 | Mar 30, 2026 06:59 | 3,155 | 61,757,625 | 34,700,000 | 0 | 2,277,376 | ||
| 15 | Mar 30, 2026 06:59 | 3,155 | 64,912,790 | 33,684,000 | 1,020,000 | 2,392,064 | ||
| 16 | Mar 30, 2026 06:59 | 3,155 | 60,024,561 | 33,682,000 | 1,020,000 | 2,400,256 | ||
| 17 | Mar 30, 2026 06:49 | 3,156 | 60,861,843 | 33,696,000 | 1,021,000 | 2,277,376 | ||
| 18 | Mar 30, 2026 06:56 | 3,156 | 68,426,266 | 33,698,000 | 1,021,000 | 2,273,280 | ||
| 19 | Mar 30, 2026 06:53 | 3,157 | 65,076,352 | 33,705,000 | 1,021,000 | 2,396,160 | ||
| 20 | Mar 30, 2026 06:56 | 3,166 | 66,686,447 | 32,837,000 | 1,990,000 | 2,277,376 | ||
| 21 | Mar 30, 2026 06:51 | 3,167 | 60,970,683 | 34,842,000 | 0 | 2,396,160 | ||
| 22 | Mar 30, 2026 06:49 | 3,167 | 60,668,210 | 33,845,000 | 995,000 | 2,392,064 | ||
| 23 | Mar 30, 2026 06:54 | 3,167 | 60,061,326 | 33,847,000 | 995,000 | 2,277,376 | ||
| 24 | Mar 30, 2026 07:00 | 3,167 | 65,884,762 | 34,836,000 | 0 | 2,277,376 | ||
| 25 | Mar 30, 2026 06:59 | 3,167 | 59,498,166 | 34,842,000 | 0 | 2,400,256 | ||
| 26 | Mar 30, 2026 06:53 | 3,167 | 60,426,740 | 33,840,000 | 995,000 | 2,277,376 | ||
| 27 | Mar 30, 2026 06:57 | 3,167 | 66,392,722 | 33,847,000 | 995,000 | 2,277,376 | ||
| 28 | Mar 30, 2026 06:58 | 3,167 | 65,221,005 | 32,851,000 | 1,991,000 | 2,273,280 | ||
| 29 | Mar 30, 2026 06:58 | 3,167 | 60,904,556 | 34,841,000 | 0 | 2,277,376 | ||
| 30 | Mar 30, 2026 06:56 | 3,168 | 62,742,017 | 33,854,000 | 995,000 | 2,277,376 | ||
| 31 | Mar 30, 2026 06:55 | 3,168 | 58,110,760 | 32,861,000 | 1,991,000 | 2,277,376 | ||
| 32 | Mar 30, 2026 06:59 | 3,168 | 64,381,995 | 33,856,000 | 995,000 | 2,277,376 | ||
| 33 | Mar 30, 2026 07:00 | 3,168 | 61,716,825 | 34,843,000 | 0 | 2,277,376 | ||
| 34 | Mar 30, 2026 06:51 | 3,168 | 61,834,097 | 32,856,000 | 1,991,000 | 2,392,064 | ||
| 35 | Mar 30, 2026 06:50 | 3,168 | 60,863,716 | 34,853,000 | 0 | 2,277,376 | ||
| 36 | Mar 30, 2026 06:54 | 3,169 | 64,944,132 | 33,868,000 | 996,000 | 2,277,376 | ||
| 37 | Mar 30, 2026 06:57 | 3,169 | 59,036,044 | 33,864,000 | 996,000 | 2,277,376 | ||
| 38 | Mar 30, 2026 06:52 | 3,169 | 59,015,877 | 33,864,000 | 996,000 | 2,404,352 | ||
| 39 | Mar 30, 2026 06:57 | 3,170 | 60,859,574 | 33,869,000 | 996,000 | 2,277,376 | ||
| 40 | Mar 30, 2026 06:50 | 3,172 | 58,771,867 | 32,894,000 | 1,993,000 | 2,277,376 | ||
| 41 | Mar 30, 2026 06:53 | 3,172 | 62,374,378 | 32,897,000 | 1,993,000 | 2,277,376 | ||
| 42 | Mar 30, 2026 06:52 | 3,173 | 56,234,853 | 32,913,000 | 1,994,000 | 2,277,376 | ||
| 43 | Mar 30, 2026 06:48 | 3,173 | 61,113,605 | 32,909,000 | 1,994,000 | 2,400,256 | ||
| 44 | Mar 30, 2026 06:55 | 3,173 | 59,351,448 | 32,908,000 | 1,994,000 | 2,400,256 | ||
| 45 | Mar 30, 2026 06:53 | 3,174 | 55,603,412 | 33,914,000 | 997,000 | 2,277,376 | ||
| 46 | Mar 30, 2026 06:52 | 3,174 | 60,748,325 | 32,922,000 | 1,995,000 | 2,396,160 | ||
| 47 | Mar 30, 2026 06:50 | 3,175 | 60,049,552 | 32,930,000 | 1,995,000 | 2,277,376 | ||
| 48 | Mar 30, 2026 06:50 | 3,175 | 54,872,389 | 33,898,000 | 1,027,000 | 2,277,376 | ||
| 49 | Mar 30, 2026 06:55 | 3,177 | 54,307,598 | 33,953,000 | 998,000 | 2,277,376 | ||
| 50 | Mar 30, 2026 06:53 | 3,178 | 62,597,470 | 32,960,000 | 1,997,000 | 2,277,376 | ||
| 51 | Mar 30, 2026 06:57 | 3,178 | 58,020,826 | 32,963,000 | 1,997,000 | 2,510,848 | ||
| 52 | Mar 30, 2026 06:54 | 3,180 | 59,810,251 | 32,978,000 | 1,998,000 | 2,277,376 | ||
| 53 | Mar 30, 2026 06:52 | 3,181 | 60,977,851 | 32,992,000 | 1,999,000 | 2,400,256 | ||
| 54 | Mar 30, 2026 06:49 | 3,182 | 60,026,076 | 33,006,000 | 2,000,000 | 2,277,376 | ||
| 55 | Mar 30, 2026 07:00 | 3,183 | 57,405,416 | 34,011,000 | 1,000,000 | 2,277,376 | ||
| 56 | Mar 30, 2026 06:51 | 3,184 | 59,967,959 | 34,027,000 | 1,000,000 | 2,277,376 | ||
| 57 | Mar 30, 2026 06:59 | 3,186 | 56,994,877 | 33,042,000 | 2,002,000 | 2,277,376 | ||
| 58 | Mar 30, 2026 06:48 | 3,186 | 59,042,336 | 33,042,000 | 2,002,000 | 2,277,376 | ||
| 59 | Mar 30, 2026 06:48 | 3,186 | 64,908,064 | 33,041,000 | 2,002,000 | 2,396,160 | ||
| 60 | Mar 30, 2026 06:52 | 3,187 | 62,266,321 | 33,053,000 | 2,003,000 | 2,277,376 |