/in/foo.cc: In function 'bool DC(int, int, int)':
/in/foo.cc:53:17: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
     return is[i]=true;
            ~~~~~^~~~~
/in/foo.cc:55:17: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
     return is[i]=false;
            ~~~~~^~~~~~
/in/foo.cc:57:17: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
     return is[i]=false;
            ~~~~~^~~~~~
/in/foo.cc:60:18: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
      return is[i]=false;
             ~~~~~^~~~~~
/in/foo.cc:65:20: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
       return is[i] = L && R; 
              ~~~~~~^~~~~~~~