#include<stdio.h>
#include<limits.h>

void find_highest_score(){
    int n;
    
    if(scanf("%d",&n)!=1){
        return;
    }
    
    if(n<0){
        printf("Invalid Input\n");
        return;
    }
    
    if(n==0){
        return;
    }
    if(n==0){
        return;
    }
    
    int MAX_SCORE=INT_MIN;
    int current_score;
    
    for(int i=0;i<n;i++){
        if(scanf("%d",&current_score")!=1){
            return;
        }
        
        if(current_score>max_score){
            max_score=current_score;
        }
    }
    printf("%d\n",max_score);
}

int main(){
    find_highest_score();
    return 0;
}