uses crt;
var a,b: array[1..100] of integer;
c: array[1..200] of integer;
i,n,k,h: integer;
begin
clrscr;
write ('nhap n: '); readln (n);
for i:=1 to n do
begin
{clrscr;}
write ('nhap a[',i,']: '); readln (a[i]);
write ('nhap b[',i,']: '); readln (b[i]);
end;
for i:=1 to n*2 do
begin
if i mod 2<>0 then
begin
inc(k);
c[i]:=a[k];
end
else
begin
inc(h);
c[i]:=b[h];
end;
end;
write ('day c la: ');
for i:=1 to n*2 do
write (c[i]:3);
readln;
end.