$c_k=\sum _{i=0}^{n-1}(\omega_{n}^{-k})^i\times y_i.$
已知平面上有点集 $P = \{ p_1,p_2,p_3,\cdots,p_n \}$,每两点之间连出 $\binom {n}{2}$ 条线段。
求 $\lambda_5$
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8#include <iostream>
using namespace std;
int main() {
return 0;
}
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