Compilare: user.cpp: In function ‘int bfs()’: user.cpp:30: warning: comparison between signed and unsigned integer expressions user.cpp:18: warning: unused variable ‘y’ user.cpp: In function ‘int main()’: user.cpp:54: warning: unused variable ‘i’ user.cpp:56: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:57: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:59: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:63: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘int bfs()’: user.cpp:50: warning: control reaches end of non-void function