Eroare de compilare: user.cpp: In function ‘int bfs()’: user.cpp:13: error: ‘memset’ was not declared in this scope user.cpp:22: warning: comparison between signed and unsigned integer expressions user.cpp:32: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int main()’: user.cpp:75: error: ‘abs’ was not declared in this scope user.cpp:84: error: ‘abs’ was not declared in this scope user.cpp:48: warning: unused variable ‘j’ user.cpp:52: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:54: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result