Compilare: user.cpp: In function 'void bfs(int, int*)': user.cpp:31: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'void flux_init()': user.cpp:54: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'int flux()': user.cpp:77: warning: comparison between signed and unsigned integer expressions user.cpp:92: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'int main()': user.cpp:147: warning: comparison between signed and unsigned integer expressions user.cpp:154: warning: comparison between signed and unsigned integer expressions