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27 lines
554 B
27 lines
554 B
#include <bits/stdc++.h>
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using namespace std;
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typedef long long LL;
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const int N = 310;
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int a[N];
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int n;
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LL res;
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int h, t, cnt;
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int main() {
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cin >> n;
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for (int i = 1; i <= n; i++) cin >> a[i];
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sort(a + 1, a + n + 1);
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//策略：从最低直接跳到最高，然后跳到次低，跳到次高...
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t = n;
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//双指针开始
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while (h < t) {
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cnt++;
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res += pow(a[h] - a[t], 2);
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if (cnt % 2 > 0)h++;
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else t--;
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}
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//输出大吉
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cout << res << endl;
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return 0;
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} |