/in/foo.cc: In function 'void print(int, int, int)':
/in/foo.cc:11:17: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
  print(x,y+(1<<n-1),n-1);
                ~^~
/in/foo.cc:12:15: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
  print(x+(1<<n-1),y,n-1);
              ~^~
/in/foo.cc:13:15: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
  print(x+(1<<n-1),y+(1<<n),n-1);
              ~^~
/in/foo.cc: In function 'int main()':
/in/foo.cc:18:9: warning: suggest parentheses around '+' inside '<<' [-Wparentheses]
   c=1<<n+1;
        ~^~