foo.cc: In function 'int main()':
foo.cc:22:5: warning: variable 'l' set but not used [-Wunused-but-set-variable]
   22 | int l,r,d,t;
      |     ^
foo.cc:22:9: warning: unused variable 'd' [-Wunused-variable]
   22 | int l,r,d,t;
      |         ^
foo.cc:22:11: warning: unused variable 't' [-Wunused-variable]
   22 | int l,r,d,t;
      |           ^
foo.cc:9:6: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    9 | scanf("%d%d",&n,&q);
      | ~~~~~^~~~~~~~~~~~~~
foo.cc:14:6: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   14 | scanf("%d",&a[i]);
      | ~~~~~^~~~~~~~~~~~
foo.cc:46:6: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   46 | scanf("%d",&r);
      | ~~~~~^~~~~~~~~

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