Compilare: user.cpp:270: warning: this decimal constant is unsigned only in ISO C90 user.cpp: In function 'void dfsCV(int)': user.cpp:95: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'int dijkstra(int, int)': user.cpp:179: warning: comparison between signed and unsigned integer expressions user.cpp:200: warning: comparison between signed and unsigned integer expressions user.cpp:244: warning: comparison between signed and unsigned integer expressions