Compilare: user.cpp: In function ‘int main()’: user.cpp:18:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<=n; i++) ^ user.cpp:34:24: warning: ‘posj’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout<<s<<' '<<posj+1<<' '<<posi; ^