program ct;
uses crt;
var i,n,max:integer;
A:array[1..100] of integer;
begin
write('nhap n:=');readln(n);
for i:=1 to n do
begin
write('nhap mang a[',i,']:=');readln(a[i]);
end;
max:=a[1];
for i:=2 to n do
if max<a[i] then max:=a[i];
writeln(max);
readln
end.