ZOJ 3635 Cinema in Akiba[ 大规模阵列 ]

门户：

problemCode=3635">ZOJ 3635

Cinema in Akiba

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Time Limit: 3 Seconds     
Memory Limit: 65536 KB

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Cinema in Akiba (CIA) is a small but very popular cinema in Akihabara. Every night the cinema is full of people. The layout ofCIA is very interesting, as there is only one row so that every audience can enjoy the wonderful movies
without any annoyance by other audiences sitting in front of him/her.

The ticket for CIA is strange, too. There are n seats in
CIA and they are numbered from 1 to n in order. Apparently,
n tickets will be sold everyday. When buying a ticket, if there are k tickets left, your ticket number will be an integeri (1 ≤
i ≤ k), and you should choose the ith empty seat (not occupied by others) and sit down for the film.

On November, 11th, n geeks go to CIA to celebrate their anual festival. The ticket number of theith geek is
a_i. Can you help them find out their seat numbers?

Input

The input contains multiple test cases. Process to end of file.

The first line of each case is an integer n (1 ≤ n ≤ 50000), the number of geeks as well as the number of seats inCIA. Then follows a line containing
n integers a₁,a₂, ...,
a_n (1 ≤ a_i ≤n - i + 1), as described above. The third line is an integerm (1 ≤
m ≤ 3000), the number of queries, and the next line ism integers,
q₁, q₂, ..., q_m (1 ≤
q_i ≤ n), each represents the geek's number and you should help him find his seat.

Output

For each test case, print m integers in a line, seperated by one space. Theith integer is the seat number of the
q_ith geek.

Sample Input

3
1 1 1
3
1 2 3
5
2 3 3 2 1
5
2 3 4 5 1

Sample Output

1 2 3
4 5 3 1 2

思路：链表模拟一排座位1-n，不断删除，然后记录座位号。用普通的链表模拟。必定TLE。so上块状链表。来弥补链表索引太慢的缺点。

代码：

#include<cstdio>
#include<iostream>
#include<cstring>
#include<cmath>
#include<vector>
#include<algorithm>
#include<climits>
#define INF INT_MAX
using namespace std;

struct node{
    int num[1000];
    int sz;
    node* next;
    node(int sz){
        this->sz=sz;
        next=0;
    }
}*head=NULL;

int local[50010];
node *get_pos(int &x)
{
    node *t=head->next;
    while(t->next&&x>t->sz)
    {
        x-=t->sz;
        t=t->next;
    }
    return t;
}

void del(node *pos,int x,int ii)
{
    local[ii]=(pos->num)[x-1];
    for(int i=x;i<pos->sz;i++)
        (pos->num)[i-1]=(pos->num)[i];
    (pos->sz)--;
}

void build_bl(int n)
{
    node *ret=head;
    int sz=ceil(sqrt(n));
    int cur=0;
    for(int i=0;i<n/sz;i++)
    {
        node *t=new node(sz);
        for(int j=0;j<sz;j++)
            (t->num)[j]=(++cur);

        ret->next=t;
        ret=t;
    }

    if(n%sz)
    {
        node *t=new node(n%sz);
        for(int i=0;i<n%sz;i++)
            (t->num)[i]=(++cur);
        ret->next=t;
    }
}

void free_head()
{
    node *p=head;
    while(head->next)
    {
        head=head->next;
        free(p);
        p=head;
    }
}

int main()
{
    int n,m;
    while(scanf("%d",&n)!=EOF)
    {
        head=new node(0);
        build_bl(n);
        for(int i=1;i<=n;i++)
        {
            //printf("__hear\n");
            int x;
            scanf("%d",&x);
            node *pos=get_pos(x);
            del(pos,x,i);
        }
        free_head();
        scanf("%d",&m);
        int q;
        scanf("%d",&q);
        printf("%d",local[q]);
        for(int i=1;i<m;i++)
        {
            scanf("%d",&q);
            printf(" %d",local[q]);
        }
        printf("\n");
    }
    return 0;
}

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