foo.cc: In function 'int main()':
foo.cc:108:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  108 |     scanf("%d", &m);
      |     ~~~~~^~~~~~~~~~
foo.cc:109:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  109 |     scanf("%d%d", &xq, &yq);
      |     ~~~~~^~~~~~~~~~~~~~~~~~
foo.cc:110:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  110 |     scanf("%d%d", &xz, &yz);
      |     ~~~~~^~~~~~~~~~~~~~~~~~
foo.cc:112:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  112 |         scanf("%d%d%d%d", &ss[i].a1, &ss[i].b1, &ss[i].a2, &ss[i].b2);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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