//PascalABC.NET
//Версия 3.3, сборка 1611
begin
var (a,b,c):=ReadReal3();
write('S=',((a+b)/2)*sqrt(c*c-((a-b)*(a-b)/4)));
end.
Оптические, компакт-диски
<em>// PascalABC.NET 3.2, сборка 1379 от 21.01.2017</em>
begin
var a,y:real; Read(a,y);
Write((5+a)/(7-y))
end.
<u>Пример</u>
5.2 -3.11
1.00890207715134
Var
n, k: integer;
a, b, i: integer;
begin
read(n);
k := 0;
read(a);
for i := 2 to n do
begin
read(b);
if (a = 2) and (b = 2) then
k := k + 1;
a := b
end;
writeln(k)
<span>end.</span>