Compilare: user.cpp: In function 'void DFS(int)': user.cpp:28: warning: comparison between signed and unsigned integer expressions user.cpp:22: warning: unused variable 'found' user.cpp: In function 'int good(int, int, int)': user.cpp:67: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'void Vertex(int, int&, int&, int, int)': user.cpp:82: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'void DFS2(int, int)': user.cpp:99: warning: comparison between signed and unsigned integer expressions user.cpp:107: warning: comparison between signed and unsigned integer expressions user.cpp:96: warning: unused variable 'y' user.cpp:96: warning: unused variable 'j' user.cpp: In function 'void DFS3(int, int)': user.cpp:118: warning: comparison between signed and unsigned integer expressions user.cpp:120: warning: comparison between signed and unsigned integer expressions user.cpp:128: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'int main()': user.cpp:156: warning: comparison between signed and unsigned integer expressions