#include <stdio.h>
int main() {
    int n, i, num, smallest;
    scanf("%d", &n);
    if(n < =0) {
        printf("Invalid Input");
        return 0;
    }
    smallest = 100;
    for(i =0; i < n; i++) {
        scanf("%d", &num);
        if(num < 0) {
            printf("Invalid Input");
            return 0;
        }
        if(num < smallest)
        smallest = num;
    }
    printf("%d",smallest);
    return 0;
}