string Airport::extractMin()
{
	string res = events[0].element;
	events[0].key = NOTHING;
	last--;

	swap(0, last);

	int downward = 0;
	while (downward < last) {
		int child1 = downward*2+1;
		int child2 = downward*2+2;
		int child = child1;
		if (child1 >= last) /* SECOND amendment */ {
			break;
		}
		else if (child2 >= last) {
			child = child1;
		}
		else /* Finding minimum between two children */ {

		}
		if (events[child2].key < events[child].key) {
			child = child2;
		}

		if (child >= last) {
			break;
		}
		else if (events[downward].key > events[child].key) {
			swap(downward, child);
			downward = child;
		} else {
			break;
		}
	}

	return res;
}