Compilare: user.cpp: In function 'void DFS(int)': user.cpp:234: warning: statement has no effect user.cpp:238: warning: statement has no effect user.cpp:252: warning: statement has no effect user.cpp:255: warning: statement has no effect user.cpp: In function 'int permuta2(int, int)': user.cpp:125: warning: control reaches end of non-void function user.cpp: In function 'int compune(int, int)': user.cpp:159: warning: control reaches end of non-void function