foo.cc: In function 'int main()':
foo.cc:56:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   56 |    scanf("%s", s);
      |    ~~~~~^~~~~~~~~
foo.cc:65:12: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   65 |       scanf("%s", s);
      |       ~~~~~^~~~~~~~~

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