1.
var
a: integer;
begin
readln(a);
if ((a mod 10) mod 2 = 0) and ((a mod 100) mod 2 = 0) then writeln('да')
else writeln('нет');
end.
2.
var
a, max: integer;
begin
readln(a);
max : = -1;
while a < > 0 do
begin
if ((a mod 10) mod 2 = 0) and ((a mod 10) mod 2 > max) then max : = (a mod 10) mod 2;
a : = a div 10;
end;
if max < > -1 then writeln(max)
else writeln('');
end.
3.
var
mas: array[0..19] of integer;
sum, i: integer;
begin
randomize;
sum : = 0;
for i : = 0 to 19 do
begin
mas[i] : = -45 + random(1 + 45 + 55);
if (mas[i] mod 2 = 0) and (mas[i] > 0) then sum += mas[i];
end;
writeln(sum);
end.
var a: integer;
readln(a);
for i: integer := 1 to abs(a) do
if (a mod i = 0) then
writeln('> ', i);
end.
function Simple(a: integer): boolean;
begin
result := true;
for i: integer := 2 to (a div 2) do
if (a mod i = 0) then
begin
result := false;
break;
end;
end;
begin
var a: integer;
readln(a);
writeln(Simple(a));
end.
var
a: integer;
begin
readln(a);
for i: byte := length(a.ToString()) downto 1 do
write(a.ToString()[i]);
end.
function Simple(a: integer): boolean;
begin
result := true;
for i: integer := 2 to (a div 2) do
if (a mod i = 0) then
begin
result := false;
break;
end;
end;
function par(a: integer): string;
begin
for i: byte := length(a.ToString()) downto 1 do
result += a.ToString()[i];
end;
begin
var a: integer;
readln(a);
for i: integer := 1 to abs(a) do
if ((a mod i = 0) and (Simple(a)) and (par(a) = inttostr(i))) then
writeln('> ', i);
end.