Water Sequence Problem By liuzhangfeiabc - 線段樹 - 矩陣乘法

題目大意：給你兩個序列A和B，維護A/B的區間加，區間A=B和A+=B和B=A和B+=A，以及求區間和 題解：發現這是個線性變換，用線段樹維護矩陣便可，略卡常；ios // luogu-judger-enable-o2 // luogu-judger-enable-o2 // luogu-judger-enable-o2 #include<iostream> #include<cstring> #

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