Memory not freed:
-----------------
   Address     Size     Caller
0x08c25388      0x1  at AndreaSterbini/modulo2.c:375
0x08c253a8      0x2  at AndreaSterbini/modulo2.c:375
0x08c253b8     0x14  at AndreaSterbini/modulo2.c:375
0x08c253d0      0x5  at AndreaSterbini/modulo2.c:375