foo.cc: In function 'void dts::main()':
foo.cc:100:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  100 |         scanf("%d%d",&n,&q);
      |         ~~~~~^~~~~~~~~~~~~~
foo.cc:106:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  106 |             scanf("%d",&pos);
      |             ~~~~~^~~~~~~~~~~

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