uses Crt;
const n=10;
Type Mas=array [1..n] of integer;
var P, M: Mas;
i: integer;
begin
ClrScr;
for i:=1 to n do
P[i]:=10+random(20);
for i:= 1 to n do
Write (P[i]:4);
WriteLn; WriteLn;
for i:=1 to n do
if (i mod 2 = 0) then M[i]:=i*P[i] else M[i]:=-1*P[i];
for i:=1 to n do
Write (M[i]:4);
ReadLn;
end.