foo.cc: In function 'int main()':
foo.cc:23:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   23 |  scanf("%d%d%d",&t,&n,&m);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~
foo.cc:28:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   28 |    scanf("%d",&a[j]);
      |    ~~~~~^~~~~~~~~~~~

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Found 20 testcases.
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