In ACM ICPC, we could bring printouts of library code and manually transcribe them into the computer. IIRC, FFT was apart of our team's library code, but you wo

In ACM ICPC, we could bring printouts of library code and manually transcribe them into the computer. IIRC, FFT was apart of our team's library code, but you wouldn't use GMP since it would require too much typing.