Water Sequence Problem By liuzhangfeiabc - 线段树 - 矩阵乘法

题目大意:给你两个序列A和B,维护A/B的区间加,区间A=B和A+=B和B=A和B+=A,以及求区间和 题解:发现这是个线性变换,用线段树维护矩阵便可,略卡常;ios // luogu-judger-enable-o2 // luogu-judger-enable-o2 // luogu-judger-enable-o2 #include<iostream> #include<cstring> #
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