#include using namespace std; typedef long long ll; constexpr int Inf = 1000000030; constexpr ll INF= 2000000000000000000; constexpr ll MOD = 1000000007; const double PI = 3.1415926535897; typedef pair P; typedef pair PP; 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; } ll mod(ll val, ll M) { val = val % M; if(val < 0) { val += M; } return val; } template T RS(T N, T P, T M){ if(P == 0) { return 1; } if(P < 0) { return 0; } if(P % 2 == 0){ ll t = RS(N, P/2, M); if(M == -1) return t * t; return t * t % M; } if(M == -1) { return N * RS(N,P - 1,M); } return N * RS(N, P-1, M) % M; } int main() { ll A; cin >> A; A *= 2; bool ret = false; for(ll i = 3;i * i <= A;i++) { if(A % i == 0) { if((A / i + 1 - i) % 2 == 0) { ret = true; } if((A / (A / i) + 1 - (A / i)) % 2 == 0) { ret = true; } } } if(A % 2 == 0) { if(A / (A / 2) + 1 - (A / 2) % 2 == 0) { ret = true; } } if((3 - A) % 2 == 0) { ret = true; } if(ret == true) { cout << "YES" << endl; } else { cout << "NO" << endl; } }