Compilare: user.cpp: In function ‘int main()’: user.cpp:36:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<cr.size();i++) ^ user.cpp:37:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<fcr.size();j++) ^ user.cpp:19:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&n,&m); ^ user.cpp:22:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&nd.x,&nd.y); ^ user.cpp:27:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&nd.x,&nd.y); ^