program lon_nhat;
uses crt;
var A:array[1..1000] of integer;
n,i,max:integer;
begin
clrscr;
write('Nhap N: '); readln(n);
for i:=1 to n do
begin
write('Nhap so thu ',i,': '); readln(A[i]);
end;
max:=A[1];
for i:=2 to n do
if A[i]>max then max:=A[i];
write('So lon nhat la: ',max);
readln;
end.