Compilare: user.cpp: In function ‘int main()’: user.cpp:24:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<graf[i].size();j++) ^ user.cpp:14:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f1,"%ld%ld%ld",&n,&m,&s); ^ user.cpp:17:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f1,"%ld%ld",&x,&y); ^