Leftist_G's blog

Why the same codes get difference verdict? (RE and AC)
By Leftist_G, history, 8 months ago, In English

Just like the title, I submitted two codes at 534F, and then they got RE on #55 and AC. But you can see that they only have difference on the last row (a comment //???).

What happened on them or judge?

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8 months ago, # |
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You have vector<int> cnt of size $$$n$$$ created on line 126. And then on line 130 you have fr1(q,0,4) cnt[q]=0. Running this line may result in undefined behavior because the size of cnt may be less than needed.

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