Eroare de compilare: main.cpp: In function 'int main()': main.cpp:32:5: error: 'cout' was not declared in this scope 32 | cout << nr; | ^~~~ main.cpp:3:1: note: 'std::cout' is defined in header '<iostream>'; did you forget to '#include <iostream>'? 2 | #include <unordered_set> +++ |+#include <iostream> 3 | Non zero exit status: 1