`@`C++

#include <iostream>
using namespace std;
int main() {
int n;
do {
cin>>n;
}while (n <= 0);
for (int i=1;i<=n;i+=2) {
cout<<i<<" ";
}
cout<<endl;
return 0;
}

`@`Python

def main():
    while True:
        n = int(input())
        if n > 0:
            break
        else:
            print()
    for i in range(1,n+1,2):
        print(i,end=" ")
    print()
if __name__ == "__main__":
    main()

`@`Pascal

uses crt;
var n,i:Integer;
begin
clrscr;
repeat
readln(n);
until (n>0);
for i :=1 to n do
begin
if i mod 2< 0 then
write(i, ' ');
end;
writeln;
end.

C++

#include <iostream>
using namespace std;
int a;
int main() 
{
    do
    {
        cin >> a;
    }
    while(a <= 0);
    cout << a;
    return 0;
}

Python

a = 0
ma = []
if __name__ == "__main__":
    a = int(input())
    while(a <= 0):
        a = int(input())
    print(a)

$#khanhtaon$