#include<stdio.h>
int main()
{
    int N;
    scanf("%d",&N);
    
    if(N<0)
    {
        printf("Invalid input\n");
        return 0;
    }
    int scores;
    for(int i=0;i<N;i++)
    {
        scanf("%d",&scores[i]);
    }
    int new_score;
    scanf("%d",&new_score);
    
    for(int i=0;i<N-1;i++)
    {
        if(scores[i]>scores[i+1])
        {
            printf("Invalid input\n");
            return 0;
        }
    }
    int updated_scores[N+1];
    int inserted = 0;
    int j = 0;
    for(int i=0;i<N;i++)
    {
        if(!inserted && new_score<scores[i])
        {
            updated_scores[j++]=new_score;
            inserted = 1;
        }
        updated_scores[j++] = scores[i];
    }
    if(!inserted)
    {
        updated_scores[j++] = new_score;
    }
    for(int i=0;i<N;i++)
    {
        printf("%d",updated_scores[i]);
    }
    printf("\n");
return 0;
}