foo.cc: In function 'int main()':
foo.cc:46:35: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=]
             printf("%d\n",query(l));
                           ~~~~~~~~^
foo.cc:35:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d",&n,&k);
     ~~~~~^~~~~~~~~~~~~~
foo.cc:41:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%c",&p);
         ~~~~~^~~~~~~~~
foo.cc:44:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%d",&l);
             ~~~~~^~~~~~~~~
foo.cc:50:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%d%d",&l,&r);
             ~~~~~^~~~~~~~~~~~~~
foo.cc:56:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%d%d",&l,&r);
             ~~~~~^~~~~~~~~~~~~~

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