#include <iostream>
using namespace std;
void countdown(int N) {
cout << N << endl;
if (N > 0) {
countdown(N - 1);
}
}
int main() {
countdown(5);
return 0;
}
I2luY2x1ZGUgPGlvc3RyZWFtPgp1c2luZyBuYW1lc3BhY2Ugc3RkOwoKdm9pZCBjb3VudGRvd24oaW50IE4pIHsKCQoJY291dCA8PCBOIDw8IGVuZGw7CglpZiAoTiA+IDApIHsKCQljb3VudGRvd24oTiAtIDEpOwoJfQoJCn0KCmludCBtYWluKCkgewoJCgljb3VudGRvd24oNSk7CglyZXR1cm4gMDsKCQp9