Compilare: user.cpp:220: warning: this decimal constant is unsigned only in ISO C90 user.cpp:265: warning: this decimal constant is unsigned only in ISO C90 user.cpp: In function 'void dfsCV(int)': user.cpp:92: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'int dijkstra(int, int)': user.cpp:139: warning: comparison between signed and unsigned integer expressions user.cpp:160: warning: comparison between signed and unsigned integer expressions user.cpp:230: warning: comparison between signed and unsigned integer expressions