foo.cc: In function 'int main()':
foo.cc:27:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   27 |     scanf("%d",&t);
      |     ~~~~~^~~~~~~~~
foo.cc:30:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   30 |         scanf("%d%s",&n,a+1);
      |         ~~~~~^~~~~~~~~~~~~~~

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Found 4 testcases.
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