foo.c: In function 'dfs':
foo.c:27:1: warning: control reaches end of non-void function [-Wreturn-type]
   27 | }
      | ^
foo.c: In function 'main':
foo.c:34:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   34 |   scanf("%s",temp);
      |   ^~~~~~~~~~~~~~~~

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