Statistics of the rounds (official participants)
Codeforces Round 215 (Div. 1)
Codeforces Round 215 (Div. 2)
Codeforces Round 216 (Div. 2) :
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| Codeforces Round #215 (Div. 1) |
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| | First | Sent | Pretest | Hacked | Systest | Accepted | Attempts | Success | Severity |
| | | | failed | | failed | | | % | |
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| A | 00:05 | 639 | 42 | 0 | 2 | 595 | 1170 | 50.9 | 1.83 |
| B | 00:08 | 567 | 87 | 35 | 163 | 282 | 1366 | 20.6 | 2.20 |
| C | 00:13 | 413 | 73 | 61 | 23 | 256 | 770 | 33.2 | 1.59 |
| D | 00:40 | 74 | 14 | 0 | 21 | 39 | 103 | 37.9 | 1.18 |
| E | 00:39 | 23 | 2 | 0 | 7 | 14 | 28 | 50.0 | 1.36 |
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| A | 00:05 | Petr |
| B | 00:08 | tourist |
| C | 00:13 | rng_58 |
| D | 00:40 | tourist |
| E | 00:39 | rng_58 |
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| Codeforces Round #215 (Div. 2) |
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| | First | Sent | Pretest | Hacked | Systest | Accepted | Attempts | Success | Severity |
| | | | failed | | failed | | | % | |
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| A | 00:02 | 1851 | 18 | 149 | 145 | 1539 | 2410 | 63.9 | 1.28 |
| B | 00:04 | 1634 | 199 | 0 | 15 | 1420 | 2493 | 57.0 | 1.37 |
| C | 00:12 | 897 | 249 | 0 | 4 | 644 | 1937 | 33.2 | 2.12 |
| D | 00:46 | 270 | 164 | 0 | 63 | 43 | 660 | 6.5 | 1.91 |
| E | 00:48 | 124 | 74 | 0 | 32 | 18 | 237 | 7.6 | 1.61 |
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| A | 00:02 | AZerone Domenik Hedayet SAKT franc k1nval |
| | | linjek mbaros phidang r0p3Sw1ng3r zoloogg |
| B | 00:04 | WhatTheFua lawrenceli |
| C | 00:12 | Ronnoc_1 |
| D | 00:46 | razia_sultana |
| E | 00:48 | eyTns |
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| Codeforces Round #216 (Div. 2) |
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| | First | Sent | Pretest | Hacked | Systest | Accepted | Attempts | Success | Severity |
| | | | failed | | failed | | | % | |
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| A | 00:02 | 1963 | 44 | 26 | 119 | 1774 | 2481 | 71.5 | 1.22 |
| B | 00:08 | 1665 | 373 | 239 | 237 | 816 | 3667 | 22.3 | 2.12 |
| C | 00:11 | 819 | 269 | 1 | 107 | 442 | 1716 | 25.8 | 1.82 |
| D | 00:33 | 45 | 27 | 0 | 3 | 15 | 109 | 13.8 | 2.00 |
| E | 00:44 | 87 | 75 | 0 | 1 | 11 | 177 | 6.2 | 2.73 |
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| A | 00:02 | zoloogg |
| B | 00:08 | Dshovn |
| C | 00:11 | adilka |
| D | 00:33 | oml1111 |
| E | 00:44 | Dshovn |
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*Sent — participants count, who made at least one submission
*Pretest/Hacked/Systest — participants count, who failed the problem at the corresponding stage
*Accepted — participants count, who solved the problem
*Attempts — total attempts count for problem
*Success % — (successful attempts / total attempts) for problem
*Severity — average attempts count among participants, who solved the problem
Any comments or suggestions are welcome :)