#include using namespace std; #include #include #include #include #include template inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; } template inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; } #define rep(i,n) for (int i = 0; i < (n); ++i) typedef long long ll; using P=pair; const ll INF=1e18; const int mod=998244353; int main(){ int n; cin>>n; int s=0; while(n){ s^=n%3; n/=3; } cout<<(s%2==0?"YES":"NO")<