权值线段树例题【模板】普通平衡树#include<bits/stdc++.h>usingnamespacestd;constintN=1e5+1;intn,val[N],opt[N],num[N],cnt,len,san[N],m[N],rnk[N];unordered_map<int,int>dfn;structWeightedSegmentTree{ #definels(id<<1) #define