File list (Check if you may need any files):
easy
....\001
....\...\1.c
....\...\1.EXE
....\002
....\...\helloword.c
....\...\print.c
....\...\print.h
....\003
....\...\3.c
....\...\3.EXE
....\004
....\...\4.c
....\...\4.EXE
....\005
....\...\5.C
....\...\5.EXE
....\007
....\...\006
....\...\...\6.C
....\...\...\6.EXE
....\...\7.C
....\...\7.EXE
....\008
....\...\8.C
....\...\8.EXE
....\009
....\...\9.c
....\...\9.EXE
....\010
....\...\10.c
....\...\10.EXE
....\011
....\...\11.c
....\...\11.EXE
....\012
....\...\12.c
....\...\12.EXE
....\013
....\...\13.c
....\...\13.EXE
....\014
....\...\14.C
....\...\14.EXE
....\015
....\...\15.c
....\...\15.EXE
....\016
....\...\16.c
....\...\16.EXE
....\017
....\...\17.c
....\...\17.EXE
....\018
....\...\18.c
....\...\18.EXE
....\019
....\...\19.c
....\...\19.EXE
....\020
....\...\20.C
....\...\20.EXE
....\021
....\...\21.C
....\...\21.EXE
....\022
....\...\22.C
....\...\22.EXE