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 00:14 | 3,150 | 60,717,992 | 33,633,000 | 1,019,000 | 2,277,376 | ||
| 2 | Mar 30, 2026 00:12 | 3,151 | 62,659,163 | 33,646,000 | 1,019,000 | 2,277,376 | ||
| 3 | Mar 30, 2026 00:14 | 3,152 | 64,737,331 | 33,658,000 | 1,019,000 | 2,277,376 | ||
| 4 | Mar 30, 2026 00:09 | 3,154 | 62,626,777 | 33,676,000 | 1,020,000 | 2,400,256 | ||
| 5 | Mar 30, 2026 00:07 | 3,154 | 65,086,726 | 34,698,000 | 0 | 2,404,352 | ||
| 6 | Mar 30, 2026 00:09 | 3,155 | 58,541,544 | 33,680,000 | 1,020,000 | 2,277,376 | ||
| 7 | Mar 30, 2026 00:08 | 3,155 | 62,978,596 | 33,686,000 | 1,020,000 | 2,400,256 | ||
| 8 | Mar 30, 2026 00:12 | 3,155 | 60,563,400 | 34,709,000 | 0 | 2,396,160 | ||
| 9 | Mar 30, 2026 00:04 | 3,156 | 59,998,953 | 33,697,000 | 1,021,000 | 2,277,376 | ||
| 10 | Mar 30, 2026 00:04 | 3,163 | 62,801,408 | 32,810,000 | 1,988,000 | 2,277,376 | ||
| 11 | Mar 30, 2026 00:14 | 3,164 | 61,401,800 | 33,808,000 | 994,000 | 2,277,376 | ||
| 12 | Mar 30, 2026 00:11 | 3,165 | 64,815,738 | 32,828,000 | 1,989,000 | 2,277,376 | ||
| 13 | Mar 30, 2026 00:02 | 3,166 | 60,620,824 | 34,831,000 | 0 | 2,277,376 | ||
| 14 | Mar 30, 2026 00:09 | 3,167 | 60,098,315 | 33,842,000 | 995,000 | 2,277,376 | ||
| 15 | Mar 30, 2026 00:12 | 3,167 | 59,752,846 | 33,845,000 | 995,000 | 2,396,160 | ||
| 16 | Mar 30, 2026 00:04 | 3,167 | 64,428,944 | 33,846,000 | 995,000 | 2,277,376 | ||
| 17 | Mar 30, 2026 00:03 | 3,168 | 60,374,481 | 32,857,000 | 1,991,000 | 2,277,376 | ||
| 18 | Mar 30, 2026 00:05 | 3,168 | 64,934,813 | 32,854,000 | 1,991,000 | 2,482,176 | ||
| 19 | Mar 30, 2026 00:13 | 3,168 | 60,382,136 | 33,855,000 | 995,000 | 2,277,376 | ||
| 20 | Mar 30, 2026 00:07 | 3,168 | 59,679,932 | 33,858,000 | 995,000 | 2,277,376 | ||
| 21 | Mar 30, 2026 00:07 | 3,168 | 64,699,404 | 32,858,000 | 1,991,000 | 2,277,376 | ||
| 22 | Mar 30, 2026 00:11 | 3,168 | 62,063,575 | 32,857,000 | 1,991,000 | 2,277,376 | ||
| 23 | Mar 30, 2026 00:04 | 3,168 | 61,435,599 | 33,857,000 | 995,000 | 2,486,272 | ||
| 24 | Mar 30, 2026 00:11 | 3,168 | 65,938,075 | 32,860,000 | 1,991,000 | 2,396,160 | ||
| 25 | Mar 30, 2026 00:11 | 3,168 | 60,290,900 | 33,851,000 | 995,000 | 2,277,376 | ||
| 26 | Mar 30, 2026 00:11 | 3,168 | 60,217,728 | 32,858,000 | 1,991,000 | 2,277,376 | ||
| 27 | Mar 30, 2026 00:07 | 3,169 | 68,546,115 | 32,865,000 | 1,991,000 | 2,277,376 | ||
| 28 | Mar 30, 2026 00:03 | 3,169 | 59,937,609 | 33,861,000 | 995,000 | 2,277,376 | ||
| 29 | Mar 30, 2026 00:08 | 3,169 | 60,842,773 | 33,865,000 | 996,000 | 2,277,376 | ||
| 30 | Mar 30, 2026 00:07 | 3,169 | 65,083,931 | 33,861,000 | 995,000 | 2,400,256 | ||
| 31 | Mar 30, 2026 00:05 | 3,169 | 60,586,744 | 32,868,000 | 1,992,000 | 2,400,256 | ||
| 32 | Mar 30, 2026 00:10 | 3,170 | 62,148,113 | 32,883,000 | 1,992,000 | 2,404,352 | ||
| 33 | Mar 30, 2026 00:02 | 3,170 | 60,954,154 | 33,871,000 | 996,000 | 2,277,376 | ||
| 34 | Mar 30, 2026 00:12 | 3,170 | 60,296,707 | 33,874,000 | 996,000 | 2,277,376 | ||
| 35 | Mar 30, 2026 00:12 | 3,170 | 63,812,871 | 33,876,000 | 996,000 | 2,277,376 | ||
| 36 | Mar 30, 2026 00:09 | 3,170 | 67,781,958 | 34,865,000 | 0 | 2,486,272 | ||
| 37 | Mar 30, 2026 00:08 | 3,170 | 64,443,069 | 32,879,000 | 1,992,000 | 2,277,376 | ||
| 38 | Mar 30, 2026 00:06 | 3,171 | 61,319,964 | 32,887,000 | 1,993,000 | 2,404,352 | ||
| 39 | Mar 30, 2026 00:08 | 3,172 | 57,381,367 | 32,895,000 | 1,993,000 | 2,392,064 | ||
| 40 | Mar 30, 2026 00:07 | 3,173 | 56,410,201 | 32,908,000 | 1,994,000 | 2,277,376 | ||
| 41 | Mar 30, 2026 00:14 | 3,174 | 57,688,296 | 32,916,000 | 1,994,000 | 2,400,256 | ||
| 42 | Mar 30, 2026 00:13 | 3,174 | 56,323,507 | 32,916,000 | 1,994,000 | 2,408,448 | ||
| 43 | Mar 30, 2026 00:09 | 3,175 | 58,107,773 | 33,931,000 | 997,000 | 2,269,184 | ||
| 44 | Mar 30, 2026 00:02 | 3,176 | 58,391,364 | 32,940,000 | 1,996,000 | 2,392,064 | ||
| 45 | Mar 30, 2026 00:10 | 3,177 | 56,663,421 | 33,950,000 | 998,000 | 2,400,256 | ||
| 46 | Mar 30, 2026 00:04 | 3,177 | 62,481,288 | 32,949,000 | 1,996,000 | 2,404,352 | ||
| 47 | Mar 30, 2026 00:12 | 3,177 | 56,035,731 | 33,944,000 | 998,000 | 2,519,040 | ||
| 48 | Mar 30, 2026 00:05 | 3,177 | 58,179,927 | 33,946,000 | 998,000 | 2,277,376 | ||
| 49 | Mar 30, 2026 00:14 | 3,180 | 57,953,919 | 32,984,000 | 1,999,000 | 2,277,376 | ||
| 50 | Mar 30, 2026 00:06 | 3,180 | 58,398,630 | 32,978,000 | 1,998,000 | 2,404,352 | ||
| 51 | Mar 30, 2026 00:13 | 3,181 | 58,729,355 | 33,988,000 | 999,000 | 2,277,376 | ||
| 52 | Mar 30, 2026 00:06 | 3,182 | 59,768,554 | 33,005,000 | 2,000,000 | 2,392,064 | ||
| 53 | Mar 30, 2026 00:14 | 3,182 | 65,600,718 | 33,006,000 | 2,000,000 | 2,273,280 | ||
| 54 | Mar 30, 2026 00:09 | 3,182 | 58,019,028 | 34,003,000 | 1,000,000 | 2,510,848 | ||
| 55 | Mar 30, 2026 00:04 | 3,183 | 62,534,716 | 33,011,000 | 2,000,000 | 2,400,256 | ||
| 56 | Mar 30, 2026 00:08 | 3,183 | 60,973,074 | 34,012,000 | 1,000,000 | 2,277,376 | ||
| 57 | Mar 30, 2026 00:10 | 3,185 | 55,381,812 | 33,031,000 | 2,001,000 | 2,277,376 | ||
| 58 | Mar 30, 2026 00:03 | 3,186 | 58,035,979 | 34,040,000 | 1,001,000 | 2,486,272 | ||
| 59 | Mar 30, 2026 00:11 | 3,188 | 56,756,663 | 34,070,000 | 1,002,000 | 2,396,160 | ||
| 60 | Mar 30, 2026 00:08 | 3,190 | 58,134,123 | 33,089,000 | 2,005,000 | 2,277,376 |