foo.cc: In function 'int maxdiv(int, int)':
foo.cc:13:1: error: a function-definition is not allowed here before '{' token
   13 | {
      | ^
foo.cc:20:1: error: expected '}' at end of input
   20 | }
      | ^
foo.cc:6:1: note: to match this '{'
    6 | {
      | ^

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