blob: ccf95609eb2013845418a57bd08cba70ef2de4ae (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
|
var
n, a: int16;
b: array of boolean;
function all(b: array of boolean): boolean;
var
i: int16;
begin
for i := 0 to length(b) - 1 do
if not b[i] then
exit(false);
all := true
end;
begin
readln(n);
setlength(b, n);
for n := n - 1 downto 0 do
b[n] := false;
for n := 1 to length(b) do
begin
read(a);
if (a <= 0) or
(a > length(b)) then
continue;
b[a - 1] := true
end;
writeln(all(b))
end.
|
