hdoj:2050
#include <iostream>
using namespace std;int main()
{int T;while (cin >> T){for (int i = 1; i <= T; i++){int n;cin >> n;cout << 2 * n*n - n + 1 << endl;}}
}
太難,百度一下
轉載于:https://www.cnblogs.com/theskulls/p/6030776.html
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