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Programming Parallel Computers

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Open 2025

IndexContestSubmissionsPre0CP12a2b2c3a3b459aIS246a6b9aMF129aSO456LLM9aI8MM234569a9b9cX0a0b

Contest

Task Rank Time Instr.
× 109		 Cycles
× 109		 GHz Threads Lines
of code		 Nickname
Pre0 1 0.000330 0.000246 0.00085 2.60 0.99 161 :3
2 0.00058 0.00251 0.00154 2.67 0.99 39 Petul
3 0.00059 0.00225 0.00069 1.18 0.99 38 rv
10 0.00079 0.00201 0.00124 1.57 0.99 35
CP1 1 2.25 26.7 10.0 4.47 1.00 96 ilitov
2 4.78 48.5 21.3 4.46 1.00 68 nobodyinfact
3 6.29 46.6 28.1 4.47 1.00 95 biz
10 7.16 72.2 32.0 4.47 1.00 45
CP2a 1 2.13 34.2 9.51 4.47 1.00 103 ilitov
2 2.40 26.5 10.7 4.45 1.00 100 trolmark
3 2.83 12.4 12.6 4.47 1.00 93 letterc67
10 3.54 26.2 15.8 4.47 1.00 77
CP2b 1 0.313 24.3 23.1 3.99 18.5 54 😎
2 0.319 19.4 23.1 4.02 17.9 93 Petul
3 0.348 21.4 24.4 4.01 17.5 74 BaoZi
10 0.445 40.3 36.5 4.10 19.9 68
CP2c 1 0.382 3.60 1.44 3.78 1.00 114 kirbyblox
2 0.477 2.49 1.83 3.84 1.00 230 sc
3 1.01 10.8 3.98 3.95 1.00 172 trolmark
10 2.76 6.38 11.0 3.98 1.00 108
CP3a 1 1.60 138 95.4 3.36 17.8 161 gau-nernst
2 1.69 121 113 3.36 19.8 112 rv
3 1.69 130 98.5 3.37 17.3 183 biz
10 3.28 96.1 208 3.38 18.8 106
CP3b 1 0.79 52.8 46.3 3.35 17.4 153 gau-nernst
2 0.89 49.4 54.8 3.33 18.5 340 letterc67
3 1.14 123 68.1 3.60 16.6 198 Mahtimursu
10 2.01 128 133 3.75 17.6 144
CP4 1 0.100 0.67 0.348 3.48 1.00 271 wity
2 0.127 0.95 0.467 3.68 1.00 60 rv
3 0.130 1.04 0.493 3.79 1.00 104 Zihao Li
10 0.200 1.72 0.80 4.00 1.00 222
CP5 1 0.55 5.21 2.37 4.30 1.00 567 strax
2 0.59 4.99 2.56 4.31 1.00 221 kirbyblox
3 0.60 5.15 2.61 4.32 1.00 169 Matias V
10 0.97 8.98 4.26 4.37 1.00 180
CP9a 1 1.89 128 121 3.74 17.2 144 ngol4
IS2 1 0.0170 0.057 0.0202 1.20 1.00 120 Matias V
2 0.0206 0.089 0.0276 1.34 1.00 144 Ijti
3 0.0276 0.078 0.0405 1.47 1.00 102 tcpc
10 0.0440 0.184 0.084 1.91 1.00 133
IS4 1 0.125 8.73 7.39 2.98 19.8 392 :3
2 1.52 169 112 3.75 19.7 220 trolmark
3 1.52 136 114 3.75 20.0 165 Markus
10 4.65 389 390 4.21 19.9 157
IS6a 1 0.67 46.3 49.3 3.70 19.9 259 Ijti
2 1.83 176 146 4.04 19.7 85 rv
3 1.87 194 157 4.21 20.0 215 dakoro
IS6b 1 0.411 4.01 1.73 4.20 1.00 198 Ijti
2 0.447 4.26 1.89 4.23 1.00 249 lateoy
3 1.13 11.8 4.97 4.39 1.00 161 Alaa
MF1 1 7.40 19.2 33.1 4.47 1.00 439 trolmark
2 7.46 28.9 33.4 4.47 1.00 45 Zihao Li
3 7.48 20.3 33.5 4.47 1.00 52 rv
10 8.96 46.8 40.1 4.48 1.00 34
MF2 1 0.482 17.4 39.9 4.14 19.9 38 StevenKChandra
2 0.50 19.8 41.3 4.12 19.9 28 rv
3 0.52 20.9 42.9 4.12 19.9 44 tcpc
SO4 1 0.66 18.6 22.6 3.90 8.82 81 rv
2 0.84 18.4 19.7 3.46 6.76 49 Matias V
3 0.88 19.4 20.4 3.46 6.71 58 Zihao Li
SO5 1 0.54 34.1 30.2 3.97 14.0 62 toukka
2 0.74 22.4 25.7 3.90 8.97 111 dakoro
3 0.77 21.6 30.0 3.80 10.3 35 rv
SO6 1 0.318 2.97 1.33 4.19 1.00 691 strax
2 4.82 25.7 21.5 4.46 1.00 103 Ijti
LLM9a 1 4.58 67.9 340 3.77 19.7 308 Ijti
2 4.80 411 382 4.02 19.7 123 Ranjana
3 4.81 410 376 3.97 19.7 170 Zihao Li
I8MM2 1 0.63 6.22 2.80 4.43 1.00 89 CapedCapybara
2 0.63 6.25 2.80 4.42 1.00 21 tcpc
3 0.64 6.22 2.80 4.35 1.00 24 ngol4
10 0.73 5.99 3.17 4.35 1.00 32
I8MM3 1 1.63 86.5 104 3.75 17.1 304 StevenKChandra
2 2.83 195 233 4.16 19.8 157 dakoro
3 2.89 194 245 4.24 20.0 162 Zihao Li
I8MM4 1 0.62 6.44 2.69 4.32 1.00 79 dakoro
2 0.72 7.59 3.11 4.34 1.00 61 StevenKChandra
3 0.93 9.91 4.08 4.39 1.00 44 wecu
I8MM5 1 14.6 151 65.3 4.48 1.00 53 AndreS
2 15.4 164 68.9 4.47 1.00 44 wecu

✓ = already graded

Contest points

All correct submissions to the following tasks take part in the contest and you can earn extra points! When the course closes, we will compare your solution with the fastest correct solution that we received this year. If your running time is close to the fastest running time, you will get extra points as follows:

Task Running time Current Points
CP3a ≤ 1.20 × fastest = 1.20 × 1.60 s = 1.92 s 1
≤ 1.05 × fastest = 1.05 × 1.60 s = 1.68 s 2
CP3b ≤ 1.20 × fastest = 1.20 × 0.79 s = 0.95 s 1
≤ 1.05 × fastest = 1.05 × 0.79 s = 0.83 s 2
CP5 ≤ 1.20 × fastest = 1.20 × 0.55 s = 0.66 s 1
≤ 1.05 × fastest = 1.05 × 0.55 s = 0.58 s 2
IS4 ≤ 1.20 × fastest = 1.20 × 0.125 s = 0.149 s 1
≤ 1.05 × fastest = 1.05 × 0.125 s = 0.131 s 2
IS6a ≤ 1.20 × fastest = 1.20 × 0.67 s = 0.80 s 1
≤ 1.05 × fastest = 1.05 × 0.67 s = 0.70 s 2
IS6b ≤ 1.20 × fastest = 1.20 × 0.411 s = 0.493 s 1
≤ 1.05 × fastest = 1.05 × 0.411 s = 0.432 s 2
SO4 ≤ 1.20 × fastest = 1.20 × 0.66 s = 0.79 s 1
≤ 1.10 × fastest = 1.10 × 0.66 s = 0.72 s 2
SO5 ≤ 1.20 × fastest = 1.20 × 0.54 s = 0.65 s 1
≤ 1.10 × fastest = 1.10 × 0.54 s = 0.59 s 2
SO6 ≤ 1.20 × fastest = 1.20 × 0.318 s = 0.381 s 1
≤ 1.05 × fastest = 1.05 × 0.318 s = 0.334 s 2
LLM9a ≤ 1.20 × fastest = 1.20 × 4.58 s = 5.49 s 1
≤ 1.05 × fastest = 1.05 × 4.58 s = 4.80 s 2
I8MM9a ≤ 1.20 × fastest – 1
≤ 1.05 × fastest – 2
I8MM9b ≤ 1.20 × fastest – 1
≤ 1.05 × fastest – 2
I8MM9c ≤ 1.20 × fastest – 1
≤ 1.05 × fastest – 2

Here “Current” is our current estimate of the threshold based on the submissions we have got, but please note that it will change over time as we receive and grade new solutions!

Contest rules

You do not need to do anything special to benefit from the contest points; they will be calculated automatically when the course closes.

Late submissions and resubmissions are fine! You can improve your solutions still during the last week of the course, and they are eligible for the extra points from the contest!

Only fully correct solutions count in the contest: you must have a successful submission.