Compilare: user.c: In function 'preproc': user.c:58: warning: unused variable 'rev' user.c:58: warning: unused variable 'k' user.c:58: warning: unused variable 'j' user.c: In function 'read_and_solve': user.c:69: warning: unused variable 'k' user.c: In function 'baga': user.c:9: warning: 'n2' may be used uninitialized in this function user.c:9: warning: 'n1' may be used uninitialized in this function