foo.cc:43:1: error: '::main' must return 'int'
   43 | void main()
      | ^~~~
foo.cc: In function 'int main()':
foo.cc:66:1: error: expected '}' at end of input
   66 | }
      | ^
foo.cc:44:1: note: to match this '{'
   44 | {
      | ^

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