CF#215DIV2:B. Sereja and Suffixes

Sereja has an array a, consisting of n integers a₁,a₂, ..., a_n. The boy cannot sit and do nothing, he decided to study an array. Sereja took a piece of paper and wrote outm integers l₁, l₂, ..., l_m(1 ≤ l_i ≤ n). For each numberl_i he wants to know how many distinct numbers are staying on the positionsl_i,l_i + 1, ...,n. Formally, he want to find the number of distinct numbers amonga_li, a_li + 1, ..., a_n.?

Sereja wrote out the necessary array elements but the array was so large and the boy was so pressed for time. Help him, find the answer for the described question for eachl_i.

Input

The first line contains two integers n andm (1 ≤ n, m ≤ 10⁵). The second line containsn integers a₁,a₂, ..., a_n(1 ≤ a_i ≤ 10⁵) — the array elements.

Next m lines contain integers l₁, l₂, ..., l_m. Thei-th line contains integer l_i (1 ≤ l_i ≤ n).

Output

Print m lines — on the i-th line print the answer to the number l_i.

Sample test(s)

Input

10 101 2 3 4 1 2 3 4 100000 9999912345678910

Output

6666654321

 

题意：给出a和b的数组，b数组中的数字是统计这个位置之后有几个不同的数字

思路：水题，哈希记录

 

#include <stdio.h>#include <string.h>#include <algorithm>using namespace std;int n,m,a[100005],b[100005],hash[100005],ans[100005];int main(){    int i,j;    while(~scanf("%d%d",&n,&m))    {        memset(hash,0,sizeof(hash));        memset(ans,0,sizeof(ans));        int cnt = 0;        for(i = 1; i<=n; i++)            scanf("%d",&a[i]);        for(i = n; i>=1; i--)        {            if(!hash[a[i]])            cnt++;            hash[a[i]] = 1;            ans[i] = cnt;        }        for(i = 1; i<=m; i++)            scanf("%d",&b[i]);        for(i = 1; i<=m; i++)            printf("%d\n",ans[b[i]]);    }    return 0;}