michael@0: function fannkuch() {
michael@0:    var count = Array(8);
michael@0:    var r = 8;
michael@0:    var done = 0;
michael@0:    while (done < 40) {
michael@0:       // write-out the first 30 permutations
michael@0:       done += r;
michael@0:       while (r != 1) { count[r - 1] = r; r--; }
michael@0:       while (true) {
michael@0:          count[r] = count[r] - 1;
michael@0:          if (count[r] > 0) break;
michael@0:          r++;
michael@0:       }
michael@0:    }
michael@0:    return done;
michael@0: }
michael@0: assertEq(fannkuch(), 41);