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