foo.cc: In function 'int dts::search(int, int)':
foo.cc:99:5: warning: control reaches end of non-void function [-Wreturn-type]
   99 |     }
      |     ^
foo.cc: In function 'void dts::main()':
foo.cc:106:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  106 |                 scanf("%d%d",&a[i].Y,&a[i].R);
      |                 ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
foo.cc:109:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  109 |             scanf("%d",&m);
      |             ~~~~~^~~~~~~~~
foo.cc:113:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  113 |                 scanf("%d%d",&xv,&yv);
      |                 ~~~~~^~~~~~~~~~~~~~~~

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