Compilare: user.cpp: In function ‘int bfs()’: user.cpp:34: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void bfs2()’: user.cpp:65: warning: comparison between signed and unsigned integer expressions user.cpp:87: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int main()’: user.cpp:119: warning: comparison between signed and unsigned integer expressions user.cpp:148: warning: comparison between signed and unsigned integer expressions user.cpp:104: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:108: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result