Compilare: user.cpp: In function ‘void bford(int, int*)’: user.cpp:220: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void bfs(int)’: user.cpp:244: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void bfs2(int)’: user.cpp:283: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int main()’: user.cpp:321: warning: comparison between signed and unsigned integer expressions user.cpp:303: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:304: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:306: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:309: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result