#include <stdio.h>
#define MAXN 10
typedef float ElementType;
ElementType Max( ElementType S[], int N );
int main ()
{
ElementType S[MAXN];
int N, i;
scanf("%d", &N);
for ( i=0; i<N; i++ )
scanf("%f", &S[i]);
printf("%.2f\n", Max(S, N));
return 0;
}
ElementType Max( ElementType S[], int N ){
int i;
ElementType p=S[0];
for(i=1;i<N;i++){
if(p<S[i]){
p=S[i];
}
}
return p;
}