foo.cc:5:1: error: expected declaration before '}' token
    5 | }
      | ^
foo.cc: In function 'int main()':
foo.cc:16:13: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'long long int*' [-Wformat=]
   16 |     scanf("%d",&n);
      |            ~^  ~~
      |             |  |
      |             |  long long int*
      |             int*
      |            %lld

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