program bac_3;
uses crt;
var A:array[1..1000] of integer;
n,i:integer;
t:longint;
begin
clrscr;
write('Nhap n: '); readln(n);
t:=0;
for i:=1 to n do
begin
write('Nhap so thu ',i,': '); readln(A[i]);
t:=t+A[i]*A[i]*A[i];
end;
write('Tong bac 3 cua cac so la: ',t);
readln;
end.