BZOJ4768: 2555加强版之wxh loves substring

很显然的后缀平衡树
一开始以为要可持久化 发现根本不用。。
treap的常数要死人啊？
我好像T光光了？
寄刀片寄刀片

#include
#include
#include
#include
#include
#include
using namespace std;
#define ld long long

char Query[999101];

namespace Tree
{
    struct Node
    {
        int no,rank,size,Rand;
        long long l,r;
        bool cs;
        long long val(){return l+r;}
        Node *lc,*rc;
    }*T[700000];
    const
        int Max=300000;
    Node *Cache;
    int Cachetot;
    inline Node *New(){if(!Cachetot)Cache=new Node[Cachetot=Max];return Cache+(--Cachetot);}
    inline Node *New(int rand,int no,long long l,long long r){Node *K=New();K->cs=false;K->no=no;K->size=K->rank=1;K->Rand=rand;K->lc=K->rc=NULL;K->l=l,K->r=r;return K;}
    inline Node *New(Node *Old){Node *K=New();*K=*Old;return K;}
    char Con[700001];

    int Cnt;
    Node *Cur;
    void Up(Node *a){a->size=(a->rank=(a->lc?a->lc->size:0)+1)+(a->rc?a->rc->size:0);}

    void Bg()
    {
        Con[0]='A'-1;
        Cur=T[0]=New(rand(),0,-1e15,1e15);
    }

    bool cmp(Node *a,Node *b)
    {
        return Con[a->no]^Con[b->no]?Con[a->no]no]:(T[a->no-1]->val())<(T[b->no-1]->val());
    }

    void Modify(Node *N,long long l,long long r)
    {

        if(!N)return ;
        if((!N->cs)&&N->l==l&&N->r==r)
                return ;
        N->cs=false;
        N->l=l,N->r=r;
        Modify(N->lc,l,(l+r)/2);
        Modify(N->rc,(l+r)/2,r);
    }

    Node *Merge(Node *a,Node *b)
    {
        if(!a)return b;
        if(!b)return a;
        Node *R;
        if(a->Rand>b->Rand)
            R=a,R->rc=Merge(R->rc,b);
        else R=b,R->lc=Merge(a,R->lc);
        R->cs=true;
        Up(R);
        return R;
    }

    void Split(Node *Cur,Node *Op,Node *&Lc,Node *&Rc)
    {
        if(!Cur){Lc=Rc=NULL;return;}
        Cur->cs=true;
        if(cmp(Cur,Op))
        {
            Lc=Cur;
            Split(Cur->rc,Op,Lc->rc,Rc);
            Up(Lc);
            return;
        }
        Rc=Cur;
        Split(Cur->lc,Op,Lc,Rc->lc);
        Up(Rc);
    }

    void insert(char k)
    {
        Con[++Cnt]=k;
        T[Cnt]=New(rand(),Cnt,-1,-1);
        Node *Lc,*Rc;
        Split(Cur,T[Cnt],Lc,Rc);
        Cur=Merge(Lc,T[Cnt]);
        Cur=Merge(Cur,Rc);
        Modify(Cur,-1e15,1e15); 
    }

    Node *Del(Node *a)
    {
        if(!a)return NULL;
        a->cs=true;
        if(a->lc)return a->lc=Del(a->lc),Up(a),a;
        return a->rc;
    }

    void pop()
    {
        Node *Lc,*Rc;
        Split(Cur,T[Cnt],Lc,Rc);
        if(Rc==NULL)
            Cnt++,Cnt--;
        Rc=Del(Rc);
        Cur=Merge(Lc,Rc);
        Modify(Cur,-1e15,1e15);
        Cnt--;
    }

    int rank(Node *a,int Len)
    {
        if(!a)return 0;
        bool cp;
        for(int i=1;i<=Len;i++)
        if(Con[a->no-i+1]^Query[i])
            {
                cp=Con[a->no-i+1]break;
            }
        return (cp?a->rank+rank(a->rc,Len):(rank(a->lc,Len)));
    }

    int Qr(int Len)
    {
        Query[++Len]='A'-2;
        int p=rank(Cur,Len);
        Query[Len]='Z'+1;
        p=rank(Cur,Len)-p;
        return p;
    }

}
int L,mask;
inline void Decode(int l)
{
  int t=mask;
  for(int i=1;i<=l;i++){
    t=(t*131+i-1)%l;
    swap(Query[i],Query[t+1]);
  }
  for(int i=1,j=l;iint main()
{
    Tree::Bg();
    freopen("self.in","r",stdin);
    freopen("self.out","w",stdout);
    int Q;
    scanf("%d",&Q);
    scanf("%s",Query);
    int Len=strlen(Query);

    for(int i=0;iwhile(Q--)
    {
        char c;
        do c=getchar();while(c!='A'&&c!='D'&&c!='Q');
        if(c=='Q')
        {
            do c=getchar();while(c!=' ');
            int n;
            n=0;
            do c=getchar();while(c<'A'||c>'Z');
            while(c<='Z'&&c>='A')Query[++n]=c,c=getchar();

            Decode(n);
            L=Tree::Qr(n);
            mask^=L;
            printf("%d\n",L);
        }
    else    if(c=='A')
        {
            do c=getchar();while(c!=' ');
            int n;
            n=0;
            do c=getchar();while(c<'A'||c>'Z');
            while(c<='Z'&&c>='A')Query[++n]=c,c=getchar();

            Decode(n);
            for(int i=n;i>=1;i--)
                Tree::insert(Query[i]);
        }
    else
        {
            do c=getchar();while(c!=' ');
            int n;
            scanf("%d",&n);
            while(n--)
                Tree::pop();
        }
    }
    return 0;
}