BEGIN {
	cycles = 1;
	X = 1;
}
function cycle() {
	if (cycles == 20 || (cycles-20) % 40 == 0) {
		sum += cycles * X;
	}
	cycles++;
}
/addx/ {
	cycle();
	cycle();
	X += $2;
}
/noop/ {
	cycle();
}
END {
	print sum;
}