foo.cc: In function 'int main()':
foo.cc:17:9: error: expected '}' before 'else'
   17 |         else if(month==1||month==3||month==5||month==7||month==8||month==10||month==12)
      |         ^~~~
foo.cc:8:5: note: to match this '{'
    8 |     {
      |     ^

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