#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
int main() {
int n = 0;
scanf("%d", &n);
int arr[] = {0};
int i = 0;
while (i < n) {
scanf("%d", &arr[i]);
i++;
}
int max = arr[0];
int r = 1;
while (r < n) {
if (arr[r] > max) {
max = arr[r];
}
r++;
}
printf("%d", max);
return 0;
}