ubuntzei.cpp: In function 'void bfs(int, int)': ubuntzei.cpp:40: warning: comparison between signed and unsigned integer expressions ubuntzei.cpp: In function 'void dfs(int, int)': ubuntzei.cpp:63: warning: suggest parentheses around comparison in operand of '==' ubuntzei.cpp: In function 'int main()': ubuntzei.cpp:98: warning: suggest parentheses around '-' inside '<<' ubuntzei.cpp:73: warning: unused variable 'j' ubuntzei.cpp:74: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result ubuntzei.cpp:75: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result ubuntzei.cpp:76: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result ubuntzei.cpp:77: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result ubuntzei.cpp:79: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result ubuntzei.cpp:85: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result