foo.cc: In function 'void dts::main()':
foo.cc:21:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   21 |         scanf("%d",&T);
      |         ~~~~~^~~~~~~~~
foo.cc:24:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   24 |             scanf("%d",&n);
      |             ~~~~~^~~~~~~~~
foo.cc:26:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   26 |                 scanf("%d",&a[i]);
      |                 ~~~~~^~~~~~~~~~~~

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