var
a: array [1..4, 1..5] of integer;
i, j: byte;
begin
for i := 1 to 4 do
begin
for j := 1 to 5 do
begin
a[i, j] := random(10, 99);
write(a[i, j]:3);
end;
writeln();
end;
end.
--------------------------------------
const
n = 5;
var
a: array [1..n] of integer;
i, p: integer;
begin
p := 1;
for i := 1 to n do
begin
readln(a[i]);
if (i mod 2 = 0) then
p := p * i;
end;
writeln();
writeln(p);
end.