foo.cc: In function 'int main()':
foo.cc:15:11: error: expected ';' before 'return'
   15 |  cout<<sum
      |           ^
      |           ;
   16 |     return 0;
      |     ~~~~~~ 
foo.cc:17:1: error: expected '}' at end of input
   17 | }
      | ^
foo.cc:4:1: note: to match this '{'
    4 | {
      | ^

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