spoj XXXXXXXX

树套树裸题，留个版
（树状数组套平衡树）

#include
#define ll long long
#define INF 1000000000
#define mp make_pair
#define clr(x) memset(x,0,sizeof(x))

using namespace std;

inline int read()
{
    register int ret=0,c=getchar();
    while(!isdigit(c))c=getchar();
    while(isdigit(c))ret=ret*10+c-'0',c=getchar();
    return ret;
}

#define M 50005

struct tree2
{
    tree2 *son[2],*fa;
    int num,siz;
    ll sum;
}*root[M],dizhi[M<<5],*null;
#define lson son[0]
#define rson son[1]
#define key rson->lson

int t,a[M],p[M],n,m;

void pushup(tree2 *tree)
{
    tree->siz=tree->lson->siz+tree->rson->siz+1;
    tree->sum=tree->lson->sum+tree->rson->sum+a[tree->num];
}

void rotate(tree2 *tree,int x)
{
    tree2 *fa=tree->fa;
    fa->son[x^1]=tree->son[x];
    if(tree->son[x]!=null)tree->son[x]->fa=fa;
    if(fa->fa!=null)fa->fa->son[fa->fa->son[1]==fa]=tree;
    tree->fa=fa->fa;
    fa->fa=tree;
    tree->son[x]=fa;
    pushup(fa);
}

void splay(tree2 *tree,tree2 *goal,int x)
{
    if(tree==goal)return ;
    while(tree->fa!=goal)
    {
        tree2 *fa=tree->fa,*gfa=fa->fa;
        if(gfa==goal)
        {
            rotate(tree,fa->son[0]==tree);
            break;
        }
        int x=gfa->son[1]==fa;
        if(x==(fa->son[1]==tree))
        {
            rotate(fa,x^1);
            rotate(tree,x^1);
        }
        else 
        {
            rotate(tree,x);
            rotate(tree,x^1);
        }
    }
    pushup(tree);
    if(goal==null)root[x]=tree;
}

void insert(tree2 *&tree,int x,int rt)
{
    if(tree==NULL)
    {
        tree=&dizhi[t++];tree->fa=null;tree->siz=1;tree->lson=tree->rson=null;
        return ;
    }
    tree2 *fa;
    int k;
    while(!((tree==NULL||tree==null)))
        if(x>tree->num)fa=tree,k=1,tree=tree->rson;
        else fa=tree,k=0,tree=tree->lson;
    tree=&dizhi[t++];
    tree->fa=fa;
    fa->son[k]=tree;
    tree->lson=tree->rson=null;
    tree->sum=a[x];
    tree->num=x;
    tree->siz=1;
    splay(tree,null,rt);
    return ;    
}

tree2 *find(tree2 *tree,int x)
{
    while(tree->num!=x)
        if(x>tree->num)tree=tree->rson;
        else tree=tree->lson;
    return tree;
}

tree2 *find_pre(int x,int pos)
{
    tree2 *ret=null,*tree=root[x];
    while(tree!=null)
    {
        if(tree->numnum>ret->num))ret=tree;
        if(tree->num>=pos)tree=tree->lson;
        else tree=tree->rson;
    }
    return ret;
}

tree2 *find_suf(int x,int pos)
{
    tree2 *ret=null,*tree=root[x];
    while(tree!=null)
    {
        if(tree->num>pos&&(ret==null||tree->numnum))ret=tree;
        if(tree->num<=pos)tree=tree->rson;
        else tree=tree->lson;
    }
    return ret;
}

ll query_num(int x,int l,int r)
{
    if(root[x]==NULL)return 0;
    splay(find_pre(x,l),null,x);
    splay(find_suf(x,r),root[x],x);
    return root[x]->key->sum;
}

void del(int rt,int x)
{
    tree2 *tree=root[rt];
    while(tree->num!=x)
        tree=tree->son[x>tree->num];
    tree2 *fa=tree->fa;
    int d=fa->rson==tree;
    if(tree->lson==null)
        if(tree->rson==null)
            fa->son[d]=null;
        else fa->son[d]=tree->rson,tree->rson->fa=fa;
    else 
        if(tree->rson==null)
            fa->son[d]=tree->lson,tree->lson->fa=fa;
        else 
        {
            fa->son[d]=tree->lson,tree->lson->fa=fa;
            tree2 *temp=tree->lson;
            while(temp->rson!=null)temp=temp->rson;
            tree->rson->fa=temp;
            temp->rson=tree->rson;
            pushup(temp);
            splay(temp,null,rt);
            return ;
        }
    if(fa==null)return ;
    pushup(fa);
    splay(fa,null,rt);

}

#define lowbit(x) (x&(-x))

void add(int x,int pos)
{
    x++;
    for(int i=x;i<=n;i+=lowbit(i))
        insert(root[i],pos,i);
}

void delet(int x,int pos)
{
    x++;
    for(int i=x;i<=n;i+=lowbit(i))
        del(i,pos);
}

ll query(int x,int l,int r)
{
//  x++;
    ll ret=0 ;
    for(int i=x;i;i-=lowbit(i))
        ret+=query_num(i,l,r);
    return ret;
}

setint,int> >S;

int main()
{
    freopen("in.txt","r",stdin);
    freopen("out.txt","w",stdout);
    null=&dizhi[t++];
    n=read();
    for(int i=1;i<=n;i++)
    {
        insert(root[i],0,i);
        insert(root[i],n+1,i);
    }
    for(int i=1;i<=n;i++)
    {
        a[i]=read();
        setint,int> >::iterator temp=S.upper_bound(mp(a[i],i));
        if(temp!=S.begin())
        {
            temp--;
            if(temp->first==a[i])p[i]=temp->second;
            else p[i]=0;
        }
        else p[i]=0;
        add(p[i],i);
        S.insert(mp(a[i],i));
    }
    m=read();
    for(int i=1;i<=m;i++)
    {
        char c=getchar();
        int x=read(),y=read();
        if(c=='Q')printf("%lld\n",query(x,x,y));
        else 
        {
            setint,int> >::iterator temp=S.upper_bound(mp(a[x],x));   
            if(temp!=S.end()&&temp->first==a[x])
            {
                delet(x,temp->second);
                p[temp->second]=p[x];
                add(p[x],temp->second);
            }
            S.erase(mp(a[x],x));
            delet(p[x],x);
            a[x]=y;
            temp=S.upper_bound(mp(a[x],x));
            if(temp!=S.end()&&temp->first==a[x])
            {
                delet(p[temp->second],temp->second);
                p[temp->second]=x;
                add(x,temp->second);
            }
            if(temp==S.begin())p[x]=0;
            else
            {
                temp--;
                if(temp->first==a[x])p[x]=temp->second;
                else p[x]=0;
            }
            add(p[x],x);
            S.insert(mp(a[x],x));
        }
    }
    return 0;
}