izrak's blog

By izrak, history, 20 months ago, In English,
#include <algorithm>

struct RT {
    std::pair<int,int> v[100000]; // runtime linked with size of this array, 6s at 10000, 20s at 20000, who knows at 200000 (quadratic time? who knows)
} z;

int main() {

The above code seems to be stuck in compiling on g++ with c++11 under linux. (compiled as g++ -o prog prog.cpp -std=c++11) It's been tested and has failed under

  • Linux 4.0.6-1-ARCH x86_64 GNU/Linux — g++ (GCC) 5.1.0

  • Linux 4.3.3-1-ARCH x86_64 GNU/Linux — g++ (GCC) 5.3.0

  • Linux 3.19.0-21-generic x86_64 GNU/Linux — g++ (GCC) 5.3.0

  • It also fails when submitted to ideone.com, codeforces.com (eg), dmoj.ca

It appears to compile successfully using clang++ and when using cygwin

Could other people try compile this and see what results they get?

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By izrak, 3 years ago, In English,

For Fox Rocks in round 3 of hacker cup I started my timer and went to download the input file but suddenly it disconnected from facebook.com. I was able to successfuly ping google.com but i had 100% packet loss to facebook D:. I screenshoted everything to document what was happening and with just a minute left on the timer it started responding again! I tried downloading the input but I watched as it completely failed to download in time due to an extremely slow connection D:.

I submitted a feedback request asking for help and sent my code+the screenshots as proof and it appeared I would be recieving a manual judgement! :D

Soon after the contest though I recieved the judgement that my soln was incorrect on a few cases D:

After correct code was accessible I compared my output to Gleb's to find my bug but my soln gave the same results (withing 2e-6) so I also compared to Anta's output with the same result. :S

I sent off another email explaining this and a while ago recieved a response stating that there was a mistake in the manual judgement and "Sorry for the inconvenience you‘ve gone through. This solution puts you in 10th place overall, so we’ll be inviting you to the onsite finals :)"

:D :D :D

But unfortunately I am still 17 (I hadn't realised they were unaware of this) and so cannot attend this year D:

Overall quite the rollercoaster :D

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