foo.cc: In function 'int main()':
foo.cc:48:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   48 |         scanf("%d",&N);
      |         ~~~~~^~~~~~~~~
foo.cc:50:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   50 |             scanf("%d",&num[i]);
      |             ~~~~~^~~~~~~~~~~~~~
foo.cc:51:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   51 |         scanf("%d",&ww);
      |         ~~~~~^~~~~~~~~~
foo.cc:54:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   54 |             scanf("%d%d",&ask[i].l,&ask[i].r);
      |             ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

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