/in/foo.cc: In function 'int main()':
/in/foo.cc:9:19: error: expected ';' before 'if'
    9 |     n=int(20000/v)
      |                   ^
      |                   ;
   10 |     if(20000/v<0)
      |     ~~             
/in/foo.cc:15:9: error: 'else' without a previous 'if'
   15 |         else
      |         ^~~~