Compilare: user.cpp: In function ‘int main()’: user.cpp:33:53: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < graf[current_node].size(); i++ ) ^ user.cpp:20:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( f, "%d%d%d", &n, &m, &s ); ^ user.cpp:25:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( f, "%d%d", &x, &y ); ^