Compilare: user.cpp:272: warning: this decimal constant is unsigned only in ISO C90 user.cpp: In function 'void dfsCV(int)': user.cpp:96: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'int dijkstra(int, int)': user.cpp:180: warning: comparison between signed and unsigned integer expressions user.cpp:201: warning: comparison between signed and unsigned integer expressions user.cpp:246: warning: comparison between signed and unsigned integer expressions