foo.cc: In function 'int main()':
foo.cc:5:9: error: 'scanf' was not declared in this scope
    5 |         scanf("%d",&a);
      |         ^~~~~
foo.cc:11:17: error: 'cout' was not declared in this scope
   11 |                 cout<<"Yes";
      |                 ^~~~
foo.cc:1:1: note: 'std::cout' is defined in header '<iostream>'; did you forget to '#include <iostream>'?
  +++ |+#include <iostream>
    1 | using namespace std;
foo.cc:15:17: error: 'cout' was not declared in this scope
   15 |                 cout<<"No";
      |                 ^~~~
foo.cc:15:17: note: 'std::cout' is defined in header '<iostream>'; did you forget to '#include <iostream>'?

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