2014年西北工业大学机试第二题

 最开始从0,0出发，最后回到0,0

#include<iostream>
#include<cmath>
using namespace std;
int main(){
	
	int n,a,b;
	cin>>n;
	int ta = 0,tb = 0,sum = 0;
	for(int i = 0;i < n;i++){
		cin>>a>>b;
		sum += abs(a - ta);
		sum += abs(b - tb);
		ta = a;
		tb = b; 
	}
	sum += abs(ta - 0);
	sum += abs(tb - 0);
	cout<<sum<<endl; 
	return 0;
}