foo.cc: In function 'int main()':
foo.cc:100:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  100 |     scanf("%lld", &n);
      |     ~~~~~^~~~~~~~~~~~
foo.cc:103:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  103 |         scanf("%lld", &a[i]);
      |         ~~~~~^~~~~~~~~~~~~~~
foo.cc:109:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  109 |         scanf("%lld%lld%lld%lld", &op, &l, &r, &c);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Found 10 testcases.
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