foo.cc: In function 'int main()':
foo.cc:11:5: error: 'else' without a previous 'if'
   11 |     else{
      |     ^~~~
foo.cc:31:1: error: expected '}' at end of input
   31 | }
      | ^
foo.cc:6:1: note: to match this '{'
    6 | {
      | ^

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