var longRandSeed = 1;

function rand() {
	var x, i, m, n, k;
	var a = 214013;
	var c = 2531011;

	for (x = i = k = 0, m = 1; i < 32; i++, m <<= 1, k >>= 1) {
		if (longRandSeed & m) {
			k += a;
		}
		if (k & 1) {
			x |= m;
		}
	}
	m = (x & 0xffff) + (c & 0xffff);
	x = ((((x >> 16) + (c >> 16) + (m >> 16)) & 0xffff) << 16) | (m & 0xffff);

	longRandSeed = x;

	return (longRandSeed >> 16) & 0x7fff;
}

function srand(n){
	longRandSeed = n;
}