Compilare: user.cpp: In function ‘int main()’: user.cpp:34:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<vecini[i].size();j++) ^ user.cpp:44:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<vecini[0].size();i++) ^ user.cpp:16:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d %d ",&n,&m); ^ user.cpp:20:41: 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); ^