foo.cc: In function 'int main()':
foo.cc:63:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   63 |     scanf("%d%d",&n,&q);
      |     ~~~~~^~~~~~~~~~~~~~
foo.cc:65:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   65 |         scanf("%lld",&a[i]);
      |         ~~~~~^~~~~~~~~~~~~~
foo.cc:71:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   71 |         scanf("%d",&op);
      |         ~~~~~^~~~~~~~~~
foo.cc:73:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   73 |             scanf("%d%d%lld",&l,&r,&v);
      |             ~~~~~^~~~~~~~~~~~~~~~~~~~~
foo.cc:77:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   77 |             scanf("%d%lld",&x,&v);
      |             ~~~~~^~~~~~~~~~~~~~~~
foo.cc:83:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   83 |             scanf("%d",&x);
      |             ~~~~~^~~~~~~~~

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