cartonase.cpp: In function `void ordonare(long int)': cartonase.cpp:28: warning: comparison between signed and unsigned integer expressions cartonase.cpp:29: warning: comparison between signed and unsigned integer expressions cartonase.cpp: In function `void BFS(long int)': cartonase.cpp:44: warning: comparison between signed and unsigned integer expressions cartonase.cpp: In function `int main()': cartonase.cpp:65: warning: comparison between signed and unsigned integer expressions cartonase.cpp:67: warning: long int format, int arg (arg 3)