#include <bits/stdc++.h>
using namespace std;
#define endl "\n";
int main() {
long long n;
cin >> n;
long long dem = 0;
for (int i = 1; i <= n; i++) {
if (i % 2 == 0) {
cout << i << " ";
}
}
cout << endl;
return 0;
}
I2luY2x1ZGUgPGJpdHMvc3RkYysrLmg+Cgp1c2luZyBuYW1lc3BhY2Ugc3RkOwoKI2RlZmluZSBlbmRsICJcbiI7CgppbnQgbWFpbigpIHsKCQoJbG9uZyBsb25nIG47CgljaW4gPj4gbjsKCWxvbmcgbG9uZyBkZW0gPSAwOwoJCglmb3IgKGludCBpID0gMTsgaSA8PSBuOyBpKyspIHsKCQlpZiAoaSAlIDIgPT0gMCkgewoJCQljb3V0IDw8IGkgPDwgIiAiOwoJCX0KCX0KCWNvdXQgPDwgZW5kbDsKCQoJcmV0dXJuIDA7CgkKfQ==