uses crt;
var a:array[1..100]of word;
i,n,t,kt:word;
begin
clrscr;
write('n='); readln(n);
for i:=1 to n do
begin
write('a[',i,']=');readln(a[i]);
end;
write('t='); readln(t);
kt:=0;
for i:=1 to n do
if t=a[i] then
begin
kt:=1;
write(i:4);
end;
if kt=0 then writeln('khong co ',t,' trong day A');
readln;
end.