螺旋折线-第九届蓝桥杯C++B组

解题：

#include<bits/stdc++.h>
using namespace std;
typedef long long LL;
int main(){
	int x,y;
	cin>>x>>y;
	if(abs(x)<=y&&y>0){
		int n=y;
		cout<<(LL)(2*n-1)*(2*n)+x-(-n)<<endl;
	}else if(abs(y)<=x&&x>0){
		int n=x;
		cout<<(LL)(2*n)*(2*n)+n-y<<endl;
	}else if(abs(x)<=abs(y)+1&&y<0){
		int n=abs(y);
		cout<<(LL)(2*n)*(2*n+1)+n-x<<endl;
	}else if(abs(y)<abs(x)&&x<0){
		int n=abs(x);
		cout<<(LL)(2*n-1)*(2*n-1)+y+n-1<<endl;
	}
	return 0;
}