I completed the DNA problem on pset6. There is a series of tests you need to enter into the command line before you submit, and I did all of them and passed every single one (as shown below).

However, when I used submit50 and submitted my code, I only got 42%.

Even when I go into the link it gave me and look further into the check50 to see what I got wrong, I see that it's failing tests that work even when I copy the command straight from that page back into my command prompt.

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^ Fails all the other ones not shown in the picture

1 Answer 1


checkCS50 is strict, once it gave me a zero just because the result did not had '\n' as expected, so share your last part of the code when printing the match i will try to help

  • 1
    I just figured it out, it was because my program was way too slow and I made some changes to improve the runtime. Thanks! May 26, 2020 at 1:23

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