Project Euler 170(unsolved)

/**
 * Copyright uwi ( http://wonderfl.net/user/uwi )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/k343
 */

package {
    import flash.display.Sprite;
    import flash.text.TextField;
    import flash.utils.getTimer;
    // @see http://projecteuler.net/index.php?section=problems&id=
    public class Euler extends Sprite {
        private var _tf : TextField;
  
        public function Euler() {
            _tf = new TextField();
            _tf.width = 465;
            _tf.height = 465;
            addChild(_tf);
            
            var s : int = getTimer();
            tr(solve());
            var g : int = getTimer();
            tr((g - s) + " ms");
        }

        private function solve() : Number
        {
        		var i : uint;
        		var a : Array = [1, 0, 2, 3, 4, 5, 6, 7, 8, 9];
        		while(true){
        			if(!nextPermutation(a))break;
        		}
        		return 11;
        }

        private function nextPermutation(src : Array) : Array
        {
            for(var i : int = src.length - 2;i >= 0 && src[i] > src[i + 1];i--);
            if(i == -1)return null;
            for(var j : int = i + 1;j < src.length && src[i] < src[j];j++);
            var d : int;
            d = src[i]; src[i] = src[j - 1]; src[j - 1] = d;
            for(var p : int = i + 1, q : int = src.length - 1;p < q;p++, q--){
                d = src[p]; src[p] = src[q]; src[q] = d;
            }
            return src;
        }
        
        private function tr(...o : Array) : void
        {
            _tf.appendText(o + "\n");
            _tf.scrollV = _tf.maxScrollV;
        }
    }
}