#include<stdio.h>
int main(void)
{
int n;
scanf("%d",&n);
int *scor=(int *)malloc(sizeof(int)*n);
int max=0;
for(int i=0;i<n;i++)
{
scanf("%d",&scor[i]);
max=max>scor[i]?max:scor[i];
}
printf("%d",max);
return 0;
}