Compilare: user.cpp: In function ‘int BFS(int)’: user.cpp:66:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( i = 0 ; i < G[vertex].size() ; i ++ ) ^ user.cpp: In function ‘void Cerinta2()’: user.cpp:98:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( i = 0 ; i < G[nod].size() ; i ++ ){ ^ user.cpp: In function ‘void Read()’: user.cpp:44:39: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ( "%d%d%d" , &V , &n , &m ); ^ user.cpp:47:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ( "%d" , &P[i] ); ^ user.cpp:49:42: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ( "%d%d%d" , &x , &y , &d ); ^ user.cpp: In function ‘int main()’: user.cpp:133:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ( IN , "r" , stdin ); ^ user.cpp:134:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ( OUT , "w" , stdout ); ^