Compilare: user.cpp: In function ‘int main()’: user.cpp:45:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=1;j<l[i].size();j++) ^ user.cpp:30:13: warning: unused variable ‘m’ [-Wunused-variable] int i,j,m,nr=1,maxi=0,nrmax=0,k,temp; ^ user.cpp:31:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&n); ^ user.cpp:33:53: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d %d",&v[i].x,&v[i].y,&v[i].r); ^