13. 6
C1*3=(A2-B2)*3=(2+A1-(A2+B1)/2)*3=(5-(5+1)/2)*3=(5-3)*3=6
14.3
Андреева
Баранкин
Иванова
15. 11221
5-1 4-1 3*3 9*3 27-1 26
16. 2
a b
4 0 a:=4
4 8 b:=8+2*a
2 8 a:=b/2*a
17.
var b,c:integer;
begin
b:=11
c:=0
if b=1 then ... else begin b:=b-1; c:=c+b; end;
end.