Compilare: user.cpp: In function 'void cit()': user.cpp:13: warning: unused variable 'i' user.cpp: In function 'void dfs(int)': user.cpp:29: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'void df(int, int)': user.cpp:47: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'void DFS(int)': user.cpp:59: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'void afis()': user.cpp:72: warning: comparison between signed and unsigned integer expressions user.cpp:69: warning: unused variable 'j' user.cpp:69: warning: 'p' may be used uninitialized in this function