#include <iostream>
using namespace std;
const int N = 1e5 + 10;
int a[N * 2];
long long s[N * 2];
int main() {
	int n;
	cin >> n;
	for (int i = 1; i <= n * 2; i++) {
		cin >> a[i];
		a[i + n] = a[i];
	}
	for (int i = 1; i <= n * 2; i++) {
		s[i] = s[i - 1] + a[i];
	}
	return 0;
}

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玄关