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