drumuri.cpp: In function 'void BFS(int)': drumuri.cpp:16: warning: comparison between signed and unsigned integer expressions drumuri.cpp: In function 'int main()': drumuri.cpp:65: warning: comparison between signed and unsigned integer expressions drumuri.cpp:46: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result drumuri.cpp:47: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result drumuri.cpp:49: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result drumuri.cpp:51: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result