8
14
2015
0

2223: [Coci 2009]PATULJCI

2223: [Coci 2009]PATULJCI

Description

Input

 

Output

10 3 1 2 1 2 1 2 3 2 3 3 8 1 2 1 3 1 4 1 5 2 5 2 6 6 9 7 10

Sample Input

no
yes 1
no
yes 1
no
yes 2
no
yes 3

Sample Output

 

HINT

 

Notice:输入第二个整数是序列中权值的范围Lim,即1<=ai(1<=i<=n)<=Lim。

1<=Lim<=10000

 

 

 

这是一道主席树的题。。。

#include<cstdio>
#define MaxN 300010
#define MaxT 10000010
int N,M,Q,tot;
int Ans;
struct point{
    int l,r,sum;
    point (int x=0,int y=0,int s=0){
        l=x; r=y; sum=s;
    }
}P[MaxT];
int root[MaxN];
int Get(){
    char Ch;
    while ((Ch=getchar())<'0'||Ch>'9');
    int Num=Ch-'0';
    while ((Ch=getchar())>='0'&&Ch<='9')
        Num=Num*10+Ch-'0';
    return Num;
}
void Insert(const int &y,int &x,const int &l,const int &r,const int &p){
    P[x=++tot]=P[y];
    ++P[x].sum;
    if (l==r) return;
    int mid=(l+r)/2;
    if (p<=mid) Insert(P[y].l,P[x].l,l,mid,p);
    else Insert(P[y].r,P[x].r,mid+1,r,p);
}
void find(const int &y,const int &x,const int &l,const int &r,const int &c){
    if (l==r){
        if (P[x].sum-P[y].sum>c) Ans=l;
        return;
    }
    int tmp=P[P[x].l].sum-P[P[y].l].sum;
    int mid=(l+r)/2;
    if (tmp>c) find(P[y].l,P[x].l,l,mid,c);
    else find(P[y].r,P[x].r,mid+1,r,c);
}
int main(){
    N=Get(); M=Get();
    for (int i=1;i<=N;++i)
        Insert(root[i-1],root[i],1,M,Get());
    Q=Get();
    for (;Q--;){
        int l=Get(),r=Get();
        Ans=0;
        find(root[l-1],root[r],1,M,(r-l+1)/2);
        if (Ans) printf("yes %d\n",Ans);
        else printf("no\n");
    }
}

 

Category: BZOJ | Tags: bzoj 主席树 | Read Count: 302

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