// a +1 loop whose bound is len of the fixed array: the check is gone, the sum is not
fn acc(fixed []int f) {
	int n = len(f), i = 0, s = 0;
	for (; i < n; i += 1) f[i] = i + 1;
	for (i = 0; i < n; i++) s = s + f[i];
	return s;
}
o3 fn acc3(fixed []int f) {
	int n = len(f), i = 0, s = 0;
	for (; i < n; i++) f[i] = i + 1;
	for (i = 0; i < n; i++) s += f[i];
	return s;
}
o3 fn small(fixed []int f) {
	int n = len(f), c = 0, i, j;
	for (i = 2; i < n; i++) f[i] = 1;
	for (i = 2; i * i < n; i++)
		if (f[i]) for (j = i * i; j < n; j += i) f[j] = 0;
	for (i = 2; i < n; i++) c += f[i];
	return c;
}
fn main() {
	fixed []int f = new(fixed []int, 10);
	fixed []int g = new(fixed []int, 20);
	put_n(acc(f)); put_c(32); put_n(acc3(f)); put_c(32); put_n(small(g)); put_c(10);
	free(d*f); free(d*g);
	return 0;
}