foo.cc: In function 'int main()':
foo.cc:19:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   19 |  scanf("%lld", &t);
      |  ~~~~~^~~~~~~~~~~~
foo.cc:23:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   23 |   scanf("%lld %lld", &n, &k);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~

Found 20 testcases.
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