Compilare: user.cpp: In function ‘int max(int)’: user.cpp:32: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void dfs3(int)’: user.cpp:46: 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 dfs2(int)’: user.cpp:73: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void dfs4(int)’: user.cpp:91: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int main()’: user.cpp:103: warning: unused variable ‘min’ user.cpp:103: warning: unused variable ‘p’