foo.cc: In function 'int main()':
foo.cc:37:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   37 |   scanf("%d", &m);
      |   ~~~~~^~~~~~~~~~
foo.cc:42:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   42 |    scanf("%d%d", &x, &y);
      |    ~~~~~^~~~~~~~~~~~~~~~

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