#include <iostream>
#include <cstring>
#include <cstdio>
using namespace std;
const int N = 100000;
int a[N];
long f(int i, int j) {
long ans1 = j - i;
long ans2 = 0;
for (i; i <= j - 1; i++) {
ans2 = ans2 + a[i];
}
long ans = ans1 * ans1 + ans2 * ans2;
return ans;
}
int main() {
int n;
cin >> n;
for (int i = 0; i < n; i++) {
cin >> a[i];
}
long min = f(1, 2);
for (int i = 1; i < n; i++) {
for (int j = i + 1; j <= n; j++)
if (f(i, j) < min)
min = f(i, j);
}
cout << min;
}
