学步园

1005

m.p1005 = function(arr) {
	var a = arr[0], b = arr[1], n = arr[2];
	return f(n);

	function f(n) {
		if (n == 1 || n == 2) {
			return 1;
		} else {
			return (a * f(n - 1) + b * f(n - 2)) % 7;

		}
	}

};