螺旋折线（蓝桥杯18G）

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#include<iostream>
using namespace std;
typedef pair<int,int> Dot;//存储坐标
int dy[] = { 0,1,0,-1 };
int dx[] = { -1,0,1,0 };
int main() {
	int direction = 0,x,y,dis = 0;
	Dot pos = make_pair(0,0);
	cin >> x >> y;
	for (int i = 1;; i++) {
		for (int j = 1; j <= 2;j++) {
			int dis1 = 0;
			do {
				pos = make_pair(pos.first+dx[direction],pos.second+dy[direction]);
				dis++;
				dis1++;
				if (pos.first == x && pos.second == y) {
					cout << dis;
					return 0;
				}
			} while (dis1<i);
			direction = (direction + 1) % 4;
		}
	}
	return 0;

#include<iostream>
using namespace std;
typedef long long ll;
int main() {
	int x, y;
	cin >> x >> y;
	ll n = max(abs(x),abs(y));
	ll sum = (8 + 8 * (n - 1)) * (n - 1) / 2;
	if (x < y) {
		sum += 2 * n + x + y;
	}
	else {
		sum += 6 * n - x - y;
	}
	cout << sum;
	return 0;
}