program zad;
var
a:array[1..4,1..5] of integer;
i,j:integer;
begin
for i:=1 to 4 do
begin
for j:=1 to 5 do
begin
write('a[',i,',',j,']=');
readln(a[i,j]);
end;
end;
writeln('исходный массив: ');
for i:=1 to 4 do
begin
for j:=1 to 5 do
begin
write(a[i,j]:5);
end;
writeln;
end;
writeln('преобразованый массив: ');
for i:=1 to 4 do
begin
for j:=1 to 5 do
begin
if a[i,j]<0 then a[i,j]:=abs(a[i,j]);
write(a[i,j]:5);
end;
writeln;
end;
readln;
end.