#include <math.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <assert.h>
#include <limits.h>
#include <stdbool.h>

int main(){
    int n,a[10],b=0,j,c=0,k,flag=0,min; 
    scanf("%d",&n);
    int *types = malloc(sizeof(int) * n);
    for(int types_i = 0; types_i < n; types_i++){
       scanf("%d",&types[types_i]);
    }
    
   
    for(int i=0;i<n;i++)
        {
        c=0;
        flag=0;
            for(j=i+1;j<n;j++)
                {
                  if(types[i]==types[j])
                      c++;
                   else
                       continue;
                }
        if(c>=1)
            {
              for(k=0;k<=b;k++)
                  {
                  if(a[k]==types[i])
                      {
                        flag=1;
                         break;
                  }
              }
            if(flag!=1)
                {
                a[b]=types[i];
                b++;
            }
             
        }
    }
    
   
    
     min=a[0];
    for(int i=0;i<b;i++)
        {
          if(min>a[i])
              min=a[i];
          else
              continue;
    }
    
    printf("%d",min);
   
    
    return 0;
}