#include<stdio.h>
int main(){
    int n,i;
    int min_temp;
    int current_temp;
    
    scanf("%d",&n);
    if(n!=1||n<0){
        printf("Invalid input\n");
        return 0;
    }
    if(n==0){
        printf("Invalid input\n");
        return 0;
    }
    for(i=0;i<n;i++){
        if(scanf("%d",&current_temp)!=1){
            printf("Invalid input\n");
            return 0;
        }
        if (current_temp < min_temp){
            min_temp=current_temp;
        }
        
    }
    prinft("%d\n",min_temp);
    return 0;
    
}