// editor3
#include<stdio.h>
int main(){
    int n;
    scanf("%d", &n);
    if(n<=0){
        printf("Invalid input");
        return;
    }
    int arr[n];
    for(int i=0;i<n;i++){
        scanf("%d", &arr[i]);
        if(arr[i]<0){
            printf("Invalid Input");
            return 0;
        }
    }
    int smallest = arr[0];
    for (int i=1;i<n;i++){
        if(arr[i]<smallest)
        smallest == arr[i];
    }
    printf("%d", smallest);
    return 0;
}