Compilare: user.cpp: In function ‘void BFS(int)’: user.cpp:22:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0 ; i < G[nod].size() ; ++i ) ^ user.cpp: In function ‘int main()’: user.cpp:37:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( f, "%d%d", &n, &m ); ^ user.cpp:40:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( f, "%d%d", &x, &y ); ^ user.cpp:42:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( f, "%d", &b ); ^ user.cpp:46:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( f, "%d%d", &k, &x ); ^ user.cpp:49:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( f, "%d", &y ); ^