1 2

const n=3; m=4;
var a:array [1..n,1..m] of integer;
var b:array [1..n,1..m] of integer;
i,j,z,x,max:integer;
begin
randomize;
writeln('Do:');

for i:=1 to n do begin
for j:=1 to m do begin
a[i,j]:=random (20)-10;
b[i,j]:=a[i,j];
write (a[i,j]:3);
end;
writeln;
end;
for i:=1 to n do begin
b[1,i]:=a[2,i];
b[2,i]:=a[1,i];
end;


writeln('Posle:');
for i:=1 to n do begin
for j:=1 to m do begin

write (b[i,j]:3);
end;
writeln;
end;
end.