foo.c: In function 'insert':
foo.c:83:5: error: expected declaration or statement at end of input
   83 |     }
      |     ^
foo.c:77:11: warning: variable 'p' set but not used [-Wunused-but-set-variable]
   77 |     node *p=NULL;
      |           ^
foo.c:84: warning: control reaches end of non-void function [-Wreturn-type]

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