Compilare: user.cpp: In function ‘int bfs(int, int)’: user.cpp:24: warning: suggest explicit braces to avoid ambiguous ‘else’ user.cpp: In function ‘void ek(int, int)’: user.cpp:48: warning: suggest explicit braces to avoid ambiguous ‘else’ user.cpp:55: warning: statement has no effect user.cpp: In function ‘int main()’: user.cpp:68: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:69: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:72: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result