foo.cc: In function 'int main()':
foo.cc:15:20: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'long long int*' [-Wformat=]
  scanf("%d%d",&t,&n);
               ~~   ^
foo.cc:15:20: warning: format '%d' expects argument of type 'int*', but argument 3 has type 'long long int*' [-Wformat=]
foo.cc:15:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&t,&n);
  ~~~~~^~~~~~~~~~~~~~

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