foo.cc: In function 'int main()':
foo.cc:64:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &T);
  ~~~~~^~~~~~~~~~
foo.cc:68:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d%d", &A, &B, &C);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~

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