//ww:run-exit 70
package main;
type box = struct { pc: size, matched: bool };
fn add(p: *[]box, v: size) void = {
	if (v % 2 == 0) {
		append(*p, box { pc = v, matched = true });
	} else {
		append(*p, box { pc = v, matched = false });
	};
};
export fn main() i32 = {
	let lo: i64 = 0x5151;
	let bs: []box = [];
	let hi: i64 = 0x7272;
	let i: size = 0;
	for (i < 100) {
		add(&bs, i);
		i += 1;
	};
	if (len(bs) != 100) { return 1; };
	let j: size = 0;
	for (j < 100) {
		if (bs[j].pc != j) { return 2; };
		if (bs[j].matched != (j % 2 == 0)) { return 3; };
		j += 1;
	};
	if (lo != 0x5151 || hi != 0x7272) { return 4; };
	return 70;
};