Compilare: user.cpp: In function ‘int main()’: user.cpp:104:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<sol.size()-1; i++) ^ user.cpp: In function ‘void Read()’: user.cpp:32:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d",&n,&m); ^ user.cpp:35:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d",&x,&y); ^