// editor4
#include<stdio.h>
#include<stdlib.h>
#include<limits.h>

void findMaxMinsum(int arr[],int n){
    if(n<=0){
        printf("Invalid input\n");
        return 0;
    }
    int max = arr[0];
    int min =arr[0];
    for(int i=1;i<n;i++){
        if(arr[i]>max){
            max=arr[i];
        }
        if(arr[i]<min){
            min=arr[i];
        }
    }
    printf("%d\n",max + min);
}
int main(){
    int n;
    if(scanf("%d",&n)!=1||n<=0){
        printf("Invalid input\n");
        return 1;
    }
    int scores[15];
    int valid_input = 1;
    for(int i=0;i<n;i++){
        if(scanf("%d",&scores[i])!=1){
            valid_input=0;
            break;
        }
    }
    if(valid_input){
        findMaxMinsum(scores,n);
    }else{
        printf("Invalid input\n");
    }
    return 0;
}