Compilare: user.cpp: In member function ‘int Graph::getCost(int, int)’: user.cpp:26:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < elements[start].size(); i++) { ^ user.cpp: In function ‘int main()’: user.cpp:40:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d %d",&nodes,&edges); ^ user.cpp:46:42: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d %d %d",&x,&y,&cost); ^