output_description: If Takahashi's growth will be celebrated, print `YES`; if it will not, print
  `NO`.
  
  * * *
input_description: Input is given from Standard Input in the following format:
  
      
      
      X
attempt: #include <iostream>
  #include <sstream>
  #include <algorithm>
  #include <string>
  #include <vector>
  #include <map>
  #include <set>
  #include <queue>
  #include <deque>
  #include <stack>
  #include <memory>
  #include <complex>
  #include <numeric>
  #include <cstdio>
  #include <iomanip>
  
  #define REP(i,m,n) for(int i=int(m);i<int(n);i++)
  #define RREP(i,m,n) for(int i=int(n)-1;i>=int(m);--i)
  #define EACH(i,c) for (auto &(i): c)
  #define all(c) begin(c),end(c)
  #define EXIST(s,e) ((s).find(e)!=(s).end())
  #define SORT(c) sort(begin(c),end(c))
  #define pb emplace_back
  #define MP make_pair
  #define SZ(a) int((a).size())
  
  #ifdef LOCAL
  #define DEBUG(s) cout << (s) << endl
  #define dump(x)  cerr << #x << " = " << (x) << endl
  #define BR cout << endl;
  #else
  #define DEBUG(s) do{}while(0)
  #define dump(x) do{}while(0)
  #define BR 
  #endif
  using namespace std;
  
  using UI = unsigned int;
  using UL = unsigned long;
  using LL = long long int;
  using ULL = unsigned long long;
  using VI = vector<int>;
  using VVI = vector<VI>;
  using VLL = vector<LL>;
  using VS = vector<string>;
  using PII = pair<int,int>;
  using VP = vector<PII>;
  
  //struct edge {int from, to, cost;};
  
  constexpr double EPS = 1e-10;
  //constexpr double PI  = acos(-1.0);
  //constexpr int INF = INT_MAX;
  constexpr int MOD = 1'000'000'007;
  
  template<class T> inline T sqr(T x) {return x*x;}
  
  void solve() {
      int n;
      cin >> n;
      if (n == 7 || n == 5 || n == 3) cout << "YES" << endl;
      else cout << "NO" << endl;
  }
  
  int main() {
      solve();
      
      return 0;
  }
problem_description: Statement
  
   _Shichi-Go-San_ (literally "Seven-Five-Three") is a traditional event in a
  certain country to celebrate the growth of seven-, five- and three-year-old
  children.
  
  Takahashi is now X years old. Will his growth be celebrated in Shichi-Go-San
  this time?
samples: [{"input": "5", "output": "YES\n    \n\nThe growth of a five-year-old child will be celebrated.\n\n* * *"}, {"input": "6", "output": "NO\n    \n\nSee you next year."}]