LOJ #2100. 「TJOI2015」線性代數

題目html a n s = max ⁡ ( ∑ i = 1 n ∑ j = 1 n a [ i ] ∗ b [ i ] [ j ] ∗ a [ j ] − ∑ i = 1 n c [ i ] ∗ a [ i ] ) ans=\max(\sum_{i=1}^n \sum_{j=1}^n a[i]*b[i][j]*a[j]-\sum_{i=1}^n c[i]*a[i]) ans=max(∑i=1n​

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