传送门 树状数组板子题。借这道题整理一下树状数组的模板 class NumArray { private: vector<int> tree; vector<int> arr; int n; int lowbit(int x) { return x & -x; } // 求前缀和 // ……
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你已到达了世界的尽头(｡・`ω´･)！
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edisoncgh
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于「4年前」在「互换友链」中说:
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于「4年前」在「互换友链」中说:( ,,´･ω･)ﾉ"(´っω･｀｡)
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