foo.cc: In function 'int min(Node*, int*)':
foo.cc:34:14: warning: statement has no effect [-Wunused-value]
   34 |         for (p; p != NULL; p = p->next)
      |              ^
foo.cc:42:14: warning: statement has no effect [-Wunused-value]
   42 |         for (p; p != NULL; p = p->next)
      |              ^

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