souvenirs.cpp:1:6: error: 'cout' in namespace 'std' does not name a type
    1 | std::cout << "Ye";
      |      ^~~~
souvenirs.cpp:1:1: note: 'std::cout' is defined in header '<iostream>'; did you forget to '#include <iostream>'?
  +++ |+#include <iostream>
    1 | std::cout << "Ye";