HDU5233——离散化——Gunner II

http://acm.hdu.edu.cn/showproblem.php?pid=5233

/*
用map和set进行离散化，离散化就是对于大数据进行重新编号

*/
/************************************************
* Author        :Powatr
* Created Time  :2015-8-12 18:27:42
* File Name     :HDU5233 Gunner II.cpp
 ************************************************/

#include <cstdio>
#include <algorithm>
#include <iostream>
#include <sstream>
#include <cstring>
#include <cmath>
#include <string>
#include <vector>
#include <queue>
#include <deque>
#include <stack>
#include <list>
#include <map>
#include <set>
#include <bitset>
#include <cstdlib>
#include <ctime>
using namespace std;

#define lson l, mid, rt << 1
#define rson mid + 1, r, rt << 1 | 1
typedef long long ll;
const int MAXN = 1e5 + 10;
const int INF = 0x3f3f3f3f;
const int MOD = 1e9 + 7;
set<int> s[MAXN];
map<int, int> mp;

int main(){
    int n, m;
    int x;
    while(~scanf("%d%d", &n, &m)){
        for(int i = 1; i <= n; i++)
            s[i].clear();
        mp.clear();
        int cnt = 0;
        for(int i = 1; i <= n; i++){
            scanf("%d", &x);
            if(!mp[x])  mp[x] = ++cnt;
            s[mp[x]].insert(i);
        }
        for(int i = 1; i <= m; i++){
            scanf("%d", &x);
            if(!s[mp[x]].size()) puts("-1");
            else {
                printf("%d\n", *(s[mp[x]].begin()));
                s[mp[x]].erase(s[mp[x]].begin());
            }
        }
    }
    return 0;
}