#include using namespace std; #ifdef DEBUG_ #include #else #define dump(...) #endif using llint = long long int; #define FastIO cin.tie(nullptr), ios_base::sync_with_stdio(false); #define rep(i, n) for (int i = 0; i < (int)(n); ++i) #define out(msg) cout << (msg) << '\n' #define die(msg) \ do { \ cout << msg << endl; \ exit(0); \ } while (0) #define all(k) k.begin(), k.end() #define rall(k) k.rbegin(), k.rend() #define INFi 1 << 30 #define INFll 1LL << 60 template bool chmax(T& a, const T& b) { return ((a < b) ? (a = b, true) : (false)); } template bool chmin(T& a, const T& b) { return ((a > b) ? (a = b, true) : false); } int main() { FastIO; llint n; cin >> n; if (n <= 3) die("Yes"); map mp; for (llint i = 2; i * i <= n; ++i) { while (n % i == 0) { mp[i]++; n /= i; } } if (n != 1) { mp[n]++; } dump(mp); int cnt{}; for (auto key : mp) { if (key.second > 0) { cnt++; } } dump(cnt); if (cnt <= 2) out("Yes"); else out("No"); }