foo.cc: In function 'int main()':
foo.cc:12:6: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 scanf( "%d" , &t );
 ~~~~~^~~~~~~~~~~~~
foo.cc:15:6: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 scanf( "%d %d" , &n , &x );
 ~~~~~^~~~~~~~~~~~~~~~~~~~~

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