Compilare: user.cpp:84:2: warning: no newline at end of file user.cpp: In function 'void BFS(int)': user.cpp:28: warning: comparison between signed and unsigned integer expressions user.cpp:47: warning: comparison between signed and unsigned integer expressions user.cpp:67: warning: name lookup of 'i' changed user.cpp:16: warning: matches this 'i' under ISO standard rules user.cpp:27: warning: matches this 'i' under old rules