/in/foo.cc: In function 'int main()':
/in/foo.cc:21:5: error: expected ',' or ';' before 'for'
   21 |     for(int i=nou;i>nou-take_ou;i--)
      |     ^~~
/in/foo.cc:21:19: error: 'i' was not declared in this scope
   21 |     for(int i=nou;i>nou-take_ou;i--)
      |                   ^