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0_0_18791349_31415.cpp: In function 'void FFT(Virt*, int, int)':
0_0_18791349_31415.cpp:68:27: error: expected ']' at end of input
                 F[k + h / 2
                           ^
0_0_18791349_31415.cpp:68:27: error: expected ';' at end of input
0_0_18791349_31415.cpp:68:27: error: expected '}' at end of input
0_0_18791349_31415.cpp:68:27: error: expected '}' at end of input
0_0_18791349_31415.cpp:68:27: error: expected '}' at end of input
0_0_18791349_31415.cpp:68:27: error: expected '}' at end of input