/in/foo.cc: In function 'int main()':
/in/foo.cc:10:15: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
  for (int i;i=1;i++)
               ^
/in/foo.cc:12:6: error: expected '(' before 'day'
   if day==0
      ^~~
/in/foo.cc:5:8: warning: unused variable 't' [-Wunused-variable]
  int k,t=1;
        ^