Упростите -аvb&a

Черта - идёт и над а и над b

var i,s,p:integer; a:array [1..100] of integer;

begin 

s:=0; p:=0;

writeln('Vvedite masiv a:'); 

for i:=1 to 10 do begin

write('a[',i,']=');

readln(a[i]);

end;

for i:=1 to 10 do begin

if a[i]>0 then s:=s+a[i]; 

end;

s:=s*2;

writeln('Udvoennaya suma polozhitelnih elementov=',s);

writeln('Indexi elementov kotorie bolshe prediduschego:');

writeln;

for i:=2 to 10 do begin

if a[i]>a[i-1] then write(i,', ');

end;

for i:=2 to 10 do begin

if ((a[i]>=0) and (a[i-1]>=0)) or ((a[i]<0) and (a[i-1]<0)) then p:=p+1;

end;

writeln;

if p>0 then writeln('Masiv imeet pari sosednih elementov s odnakovimi znakami') else  writeln('Masiv ne imeet pari sosednih elementov s odnakovimi znakami'); 

readln(s);

end. 

1)

var

a,b:array [1..100] of integer;

i,j,k,a,b,f:integer;

begin

randomize;

readln(a);

readln(b);

k:=0;

for i:=1 to 20 do

begin

a[i]:=random(135)-45;

f:=0;

for j:=a to b do

if (a[i]=j) and (a[i] mod 7 =0) then f:=1;

if f=0 then

begin

k:=k+1;

b[k]:=a[i];

end;

end;

for i:=1 to k do

writeln(b[i]);

end.

2)

var

a,b:array [1..100] of integer;

i,j,k:integer;

begin

randomize;

readln(k);

j:=0;

for i:=1 to 20 do

begin

a[i]:=random(135)-45;

writeln(a[i]);

for i:=1 to 19 do

begin

if a[i]*a[i+1]>0 then

begin

j:=j+1;

b[j]:=a[i];

j:=j+1;

b[j]:=k;

end

else

begin

j:=j+1;

b[j]:=a[i];

end;

end;

j:=j+1;

b[j]:=a[20];

for i:=1 to j do

writeln(b[j]);

3)

var

a,b:array [1..20] of integer;

i,j,k1,k2:integer;

begin

randomize;

readln(k1);

readln(k2);

if k1<k2 then

begin

for i:=1 to 20 do

begin

a[i]:=random(135)-45;

writeln(a[i]);

end;

for i:=1 to k1-1 do

b[i]:=a[i];

for i:=k2+1 to 20 do

b[i]:=a[i];

j:=k2;

for i:=k1 to k2 do

begin

b[j]:=a[i];

j:=j-1;

end;

for i:=1 to 20 do

writeln(b[i]);

end;

end.