Inventory

source

Description

Companies always have a lot of equipment, furniture and other things. All of them should be tracked. To do this, there is an inventory number assigned with each item. It is much easier to create a database by using those numbers and keep the track of everything.

During an audit, you were surprised to find out that the items are not numbered sequentially, and some items even share the same inventory number! There is an urgent need to fix it. You have chosen to make the numbers of the items sequential, starting with 1. Changing a number is quite a time-consuming process, and you would like to make maximum use of the current numbering.

You have been given information on current inventory numbers for n items in the company. Renumber items so that their inventory numbers form a permutation of numbers from 1 to n by changing the number of as few items as possible. Let us remind you that a set of n numbers forms a permutation if all the numbers are in the range from 1 to n, and no two numbers are equal.

Input
The first line contains a single integer n — the number of items (1 ≤ n ≤ 105).

The second line contains n numbers a1, a2, ..., an (1 ≤ ai ≤ 105) — the initial inventory numbers of the items.

Output
Print n numbers — the final inventory numbers of the items in the order they occur in the input. If there are multiple possible answers, you may print any of them.

Example

Input

3
1 3 2

Output

1 3 2

Input

4
2 2 3 3

Output

2 1 3 4

Input

1
2

Output

1

Note

In the first test the numeration is already a permutation, so there is no need to change anything.

In the second test there are two pairs of equal numbers, in each pair you need to replace one number.

In the third test you need to replace 2 by 1, as the numbering should start from one.

题意:给n个物品打上标签（整数），标签的范围是[1,n]。给出n个物品的标签，如果该物品的标签没有使用过并且在[1,n]范围内,则该物品的标签不变；否则，从[1,n]中选择最小的且未使用过的数字作为标签。输出n个物品的标签。

#include
#include
#include
using namespace std;
int main()
{
        int n;
        scanf("%d",&n);
        set unuse;
        set isuse;
        int *a=new int[n];
        for(int i=0;i::iterator it=unuse.begin();
                printf("%d ",*it);
                unuse.erase(it);
            }
        }
        if((a[n-1]<=n)&&(isuse.find(a[n-1])==isuse.end()))
            {
                printf("%d\n",a[n-1]);
                 isuse.insert(a[n-1]);
            }
            else {

                 set::iterator it=unuse.begin();
                printf("%d\n",*it);
                unuse.erase(it);
            }
}

#include
#include
using namespace std;
int val[100010];
bool vis[100010];
bool flag[100010];
int main()
{
        int n;
        scanf("%d",&n);
        memset(val,0,sizeof(val));
        memset(flag,0,sizeof(flag));
        for(int i=0;i