Compilare: main.cpp: In function 'int main()': main.cpp:52:32: warning: comparison of integer expressions of different signedness: '__gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type' {aka 'int'} and 'unsigned int' [-Wsign-compare] 52 | fout << ((whichNode[i] == i) ? 0 : whichNode[i]) << ' ';