foo.cc: In function 'int find_father(int)':
foo.cc:19:1: error: a function-definition is not allowed here before '{' token
   19 | {
      | ^
foo.cc:42:1: error: expected '}' at end of input
   42 | }
      | ^
foo.cc:14:1: note: to match this '{'
   14 | {
      | ^

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