Bubble Cup 12 - Finals [Online Mirror, unrated, Div. 1] E. Product Tuples

題意略,題解生成函數練習題,1+(q-ai)x卷積便可,線段樹優化(相似分治思想)html //#pragma GCC optimize(2) //#pragma GCC optimize(3) //#pragma GCC optimize(4) //#pragma GCC optimize("unroll-loops") //#pragma comment(linker, "/stack:200

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