Compilare: user.cpp: In function ‘int bfs(int, int)’: user.cpp:47: warning: suggest explicit braces to avoid ambiguous ‘else’ user.cpp: In function ‘void ek(int, int)’: user.cpp:71: warning: suggest explicit braces to avoid ambiguous ‘else’ user.cpp:79: warning: statement has no effect user.cpp: In function ‘int main()’: user.cpp:92: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:92: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:93: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:96: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result