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 22:21 | 3,149 | 61,920,717 | 33,622,000 | 1,018,000 | 2,277,376 | ||
| 2 | Mar 29, 2026 22:21 | 3,149 | 60,742,369 | 33,624,000 | 1,018,000 | 2,277,376 | ||
| 3 | Mar 29, 2026 22:13 | 3,150 | 60,644,865 | 33,635,000 | 1,019,000 | 2,400,256 | ||
| 4 | Mar 29, 2026 22:25 | 3,151 | 64,887,543 | 34,658,000 | 0 | 2,277,376 | ||
| 5 | Mar 29, 2026 22:19 | 3,151 | 61,144,531 | 34,657,000 | 0 | 2,277,376 | ||
| 6 | Mar 29, 2026 22:24 | 3,151 | 60,437,883 | 33,642,000 | 1,019,000 | 2,277,376 | ||
| 7 | Mar 29, 2026 22:18 | 3,152 | 60,079,242 | 34,669,000 | 0 | 2,404,352 | ||
| 8 | Mar 29, 2026 22:22 | 3,153 | 60,871,201 | 33,668,000 | 1,020,000 | 2,400,256 | ||
| 9 | Mar 29, 2026 22:15 | 3,153 | 63,221,819 | 34,683,000 | 0 | 2,277,376 | ||
| 10 | Mar 29, 2026 22:20 | 3,154 | 63,399,500 | 34,699,000 | 0 | 2,277,376 | ||
| 11 | Mar 29, 2026 22:21 | 3,156 | 63,900,262 | 34,713,000 | 0 | 2,277,376 | ||
| 12 | Mar 29, 2026 22:19 | 3,157 | 60,348,997 | 34,722,000 | 0 | 2,408,448 | ||
| 13 | Mar 29, 2026 22:22 | 3,165 | 59,174,754 | 33,819,000 | 994,000 | 2,400,256 | ||
| 14 | Mar 29, 2026 22:14 | 3,165 | 60,661,651 | 32,824,000 | 1,989,000 | 2,400,256 | ||
| 15 | Mar 29, 2026 22:21 | 3,165 | 61,191,551 | 32,828,000 | 1,989,000 | 2,277,376 | ||
| 16 | Mar 29, 2026 22:25 | 3,166 | 66,733,659 | 33,834,000 | 995,000 | 2,404,352 | ||
| 17 | Mar 29, 2026 22:20 | 3,166 | 56,376,222 | 32,834,000 | 1,989,000 | 2,412,544 | ||
| 18 | Mar 29, 2026 22:16 | 3,166 | 63,558,054 | 32,840,000 | 1,990,000 | 2,277,376 | ||
| 19 | Mar 29, 2026 22:21 | 3,167 | 66,709,738 | 33,841,000 | 995,000 | 2,277,376 | ||
| 20 | Mar 29, 2026 22:17 | 3,167 | 62,000,135 | 33,843,000 | 995,000 | 2,277,376 | ||
| 21 | Mar 29, 2026 22:18 | 3,167 | 59,614,700 | 32,846,000 | 1,990,000 | 2,277,376 | ||
| 22 | Mar 29, 2026 22:18 | 3,167 | 64,531,175 | 33,846,000 | 995,000 | 2,404,352 | ||
| 23 | Mar 29, 2026 22:19 | 3,167 | 62,785,603 | 34,836,000 | 0 | 2,277,376 | ||
| 24 | Mar 29, 2026 22:15 | 3,168 | 61,288,703 | 33,853,000 | 995,000 | 2,408,448 | ||
| 25 | Mar 29, 2026 22:18 | 3,168 | 64,978,847 | 33,857,000 | 995,000 | 2,277,376 | ||
| 26 | Mar 29, 2026 22:23 | 3,168 | 68,481,770 | 33,857,000 | 995,000 | 2,396,160 | ||
| 27 | Mar 29, 2026 22:16 | 3,168 | 62,642,089 | 33,858,000 | 995,000 | 2,408,448 | ||
| 28 | Mar 29, 2026 22:16 | 3,169 | 59,564,236 | 32,865,000 | 1,991,000 | 2,396,160 | ||
| 29 | Mar 29, 2026 22:20 | 3,169 | 57,161,701 | 33,861,000 | 995,000 | 2,277,376 | ||
| 30 | Mar 29, 2026 22:18 | 3,169 | 61,027,298 | 33,859,000 | 995,000 | 2,277,376 | ||
| 31 | Mar 29, 2026 22:19 | 3,169 | 59,100,392 | 33,861,000 | 995,000 | 2,277,376 | ||
| 32 | Mar 29, 2026 22:23 | 3,170 | 64,310,079 | 32,881,000 | 1,992,000 | 2,396,160 | ||
| 33 | Mar 29, 2026 22:13 | 3,170 | 60,001,186 | 33,877,000 | 996,000 | 2,277,376 | ||
| 34 | Mar 29, 2026 22:19 | 3,170 | 63,431,210 | 32,878,000 | 1,992,000 | 2,396,160 | ||
| 35 | Mar 29, 2026 22:25 | 3,171 | 57,101,613 | 32,884,000 | 1,993,000 | 2,392,064 | ||
| 36 | Mar 29, 2026 22:14 | 3,171 | 56,293,952 | 32,888,000 | 1,993,000 | 2,387,968 | ||
| 37 | Mar 29, 2026 22:17 | 3,172 | 57,303,131 | 32,895,000 | 1,993,000 | 2,277,376 | ||
| 38 | Mar 29, 2026 22:22 | 3,172 | 59,917,421 | 33,863,000 | 1,026,000 | 2,277,376 | ||
| 39 | Mar 29, 2026 22:19 | 3,173 | 60,675,083 | 33,874,000 | 1,026,000 | 2,400,256 | ||
| 40 | Mar 29, 2026 22:13 | 3,173 | 61,018,699 | 34,898,000 | 0 | 2,396,160 | ||
| 41 | Mar 29, 2026 22:14 | 3,173 | 58,841,440 | 32,904,000 | 1,994,000 | 2,478,080 | ||
| 42 | Mar 29, 2026 22:14 | 3,173 | 55,928,387 | 32,909,000 | 1,994,000 | 2,510,848 | ||
| 43 | Mar 29, 2026 22:25 | 3,174 | 61,397,573 | 33,920,000 | 997,000 | 2,396,160 | ||
| 44 | Mar 29, 2026 22:17 | 3,174 | 62,257,147 | 33,912,000 | 997,000 | 2,277,376 | ||
| 45 | Mar 29, 2026 22:24 | 3,176 | 57,925,332 | 32,936,000 | 1,996,000 | 2,404,352 | ||
| 46 | Mar 29, 2026 22:23 | 3,177 | 56,759,477 | 33,949,000 | 998,000 | 2,277,376 | ||
| 47 | Mar 29, 2026 22:21 | 3,177 | 62,553,770 | 33,946,000 | 998,000 | 2,494,464 | ||
| 48 | Mar 29, 2026 22:16 | 3,178 | 61,415,301 | 33,963,000 | 998,000 | 2,277,376 | ||
| 49 | Mar 29, 2026 22:15 | 3,179 | 56,475,172 | 33,968,000 | 999,000 | 2,277,376 | ||
| 50 | Mar 29, 2026 22:16 | 3,179 | 59,479,204 | 33,969,000 | 999,000 | 2,277,376 | ||
| 51 | Mar 29, 2026 22:23 | 3,179 | 61,139,178 | 32,974,000 | 1,998,000 | 2,277,376 | ||
| 52 | Mar 29, 2026 22:23 | 3,180 | 59,218,250 | 32,981,000 | 1,998,000 | 2,400,256 | ||
| 53 | Mar 29, 2026 22:24 | 3,181 | 62,194,230 | 32,988,000 | 1,999,000 | 2,277,376 | ||
| 54 | Mar 29, 2026 22:25 | 3,181 | 59,636,759 | 33,995,000 | 999,000 | 2,277,376 | ||
| 55 | Mar 29, 2026 22:25 | 3,182 | 54,274,077 | 33,999,000 | 999,000 | 2,277,376 | ||
| 56 | Mar 29, 2026 22:14 | 3,185 | 58,281,917 | 33,034,000 | 2,002,000 | 2,277,376 | ||
| 57 | Mar 29, 2026 22:16 | 3,187 | 56,632,060 | 34,054,000 | 1,001,000 | 2,400,256 | ||
| 58 | Mar 29, 2026 22:23 | 3,188 | 60,650,818 | 33,066,000 | 2,004,000 | 2,277,376 | ||
| 59 | Mar 29, 2026 22:14 | 3,189 | 63,994,894 | 33,076,000 | 2,004,000 | 2,277,376 | ||
| 60 | Mar 29, 2026 22:18 | 3,196 | 64,136,609 | 34,157,000 | 1,004,000 | 2,392,064 |