foo.c: In function 'Unique':
foo.c:34:9: warning: statement with no effect [-Wunused-value]
   34 |         for(p;p!=NULL;p=p->next)
      |         ^~~
foo.c: In function 'main':
foo.c:60:15: warning: 'head1' is used uninitialized [-Wuninitialized]
   60 |         head1=Create(head1,n1);
      |               ^~~~~~~~~~~~~~~~
foo.c:56:14: note: 'head1' was declared here
   56 |         Node*head1;
      |              ^~~~~
foo.c:61:15: warning: 'head2' is used uninitialized [-Wuninitialized]
   61 |         head2=Create(head2,n2);
      |               ^~~~~~~~~~~~~~~~
foo.c:57:14: note: 'head2' was declared here
   57 |         Node*head2;
      |              ^~~~~

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