#include #define REP(i, n) for (int i = 0; (i) < (int)(n); ++(i)) #define REP3(i, m, n) for (int i = (m); (i) < (int)(n); ++(i)) #define REP_R(i, n) for (int i = (int)(n)-1; (i) >= 0; --(i)) #define REP3R(i, m, n) for (int i = (int)(n)-1; (i) >= (int)(m); --(i)) #define ALL(x) ::std::begin(x), ::std::end(x) using namespace std; const string YES = "YES"; const string NO = "NO"; bool solve(int64_t n) { vector digits; while (n) { digits.push_back(n % 3); n /= 3; } return accumulate(ALL(digits), 0) % 2 == 0; } // generated by oj-template v4.7.2 (https://github.com/online-judge-tools/template-generator) int main() { std::ios::sync_with_stdio(false); std::cin.tie(nullptr); constexpr char endl = '\n'; int64_t N; cin >> N; auto ans = solve(N); cout << (ans ? YES : NO) << endl; return 0; }