solution\all pass.c
........\butt.c
........\dtsp1.doc
........\dtsp10.docx
........\dtsp2.doc
........\dtsp3.docx
........\dtsp4.docx
........\dtsp5.docx
........\dtsp6.docx
........\dtsp7.docx
........\dtsp8.docx
........\dtsp9.docx
........\idft.c
........\ifft.c