/in/foo.cc: In function 'int main()':
/in/foo.cc:27:20: warning: unused variable 'x' [-Wunused-variable]
   27 |         int a[N],n,x;
      |                    ^
/in/foo.cc:28:16: warning: 'n' is used uninitialized [-Wuninitialized]
   28 |         n=Input(a,n);
      |           ~~~~~^~~~~
/in/foo.cc:27:18: note: 'n' was declared here
   27 |         int a[N],n,x;
      |                  ^