#include // cout, endl, cin #include #include #include #include // string, to_string, stoi #include // vector #include // min, max, swap, sort, reverse, lower_bound, upper_bound #include // pair, make_pair #include // tuple, make_tuple #include // int64_t, int*_t #include // printf #include // map #include // queue, priority_queue #include // set #include // stack #include // deque #include // unordered_map #include // unordered_set #include // bitset #include // isupper, islower, isdigit, toupper, tolower #define rep(i,N) for (ll i = 0; i < (N); i++) #define repone(i,N) for(ll i = 1; i < (N); i++) #define REP(i,N) for (ll i = (N)-1; i >= 0; i--) #define FOR(j,i,N) for (ll j = (N)-1; j > (i); j--) #define repsqrt(i,N) for(ll i = 1; i*i <= (N); i++) #define updown(i,a,b) for(ll i = (a)-1; i < (b); i++) #define ST string #define vec vector #define vecs vector #define outb(s) cout << fixed << setprecision(15) << s << endl; #define out(s) cout << s << endl; #define SZ(x) ((ll)(x).size()) #define Graph vector> #define vecb vector #define P pair #define F first #define S second #define vecbool vector using ll = long long; using lb = long double; using l = int; using ll = long long; using lb = long double; using namespace std; const ll mod = 1000000007; const ll ze = 0; const lb zeb = 0.0; const ll on = 1; const ll INF = 1e8; const lb pi = 3.14159265358979; ll nCk(ll N, ll K){ if(N>1){ ll kid = 1; for(ll i = N; i > N - K; i--){ kid = kid * i; } for(ll i = 1; i < K + 1; i++){ kid = kid / i; } return kid; } else{ return 0; } } ll stair_pow(ll N){// 階乗 ll sum = 1; for(ll i = 1; i <= N; i++){ sum = sum * i % mod; } return sum % mod; } ll gcd(ll p, ll q){ return q ? gcd(q ,p % q):p; } ll lcm(ll p, ll q){ return p / gcd(p, q) * q; } bool is_prime(ll x){ if(x <= 1){ return false; } for(ll i=2; i * i <= x; i++){ if(x%i==0){ return false; } } return true; } ll sum_of_num(ll num){// 各位の和 ll dig; ll sum = 0; while(num){ dig = num % 10; sum = sum + dig; num = num / 10; } return sum; } ll how_many_break(ll n, ll m){// 何回割れるか ll counter = 0; while (n % m == 0){ n = n / m; counter++; } return counter; } ll many_pow(ll N, ll M){ // NのM乗 if(M == 0)return 1; else{ ll sum = 1; for(ll i = 0; i < M; i++){ sum *= N; } return sum; } } ll one_to_i(ll i){ // 1からiまでの和 if(i < 0){ return 0; } else{ return i*(i+1)/2; } } ll how_many_yaku(ll num){ ll ans = 0; repsqrt(i,num){ if(num % i == 0){ ans++; if(i != num/i){ ans++; } } } return ans; } ll digit(ll num){ ll digit=0; while(num!=0){ num /= 10; digit++; } return digit; } ll digitsum(ll num){ ll dig = 0,sum = 0; while(num){ dig = num % 10; sum += dig; num /= 10; } return sum; } struct UnionFind { vec d; UnionFind(ll n = 0): d(n,-1) {} ll find(ll x) { if (d[x] < 0) return x; return d[x] = find(d[x]); } bool unite(ll x, ll y) { x = find(x); y = find(y); if (x == y) return false; if (d[x] > d[y]) swap(x,y); d[x] += d[y]; d[y] = x; return true; } bool same(ll x, ll y) { return find(x) == find(y);} int size(ll x) { return -d[find(x)];} }; vecbool seen; void dfs(const Graph &G, ll v) { seen[v] = true; for (auto next_v : G[v]) { if (seen[next_v]) continue; dfs(G, next_v); } } /*-----------------------------------------------------------------------------------*/ // cout << fixed << setprecision(15) // continue // count(S.begin(),S.end(),''); // reverse(S.begin(), S.end()); // s.substr(8, 8) // sort(p.begin(), p.end()); // sort(p.rbegin(), p.rend()); ← 降順sort. // getline(cin,s); /*-----------------------------------------------------------------------------------*/ int main() { ios::sync_with_stdio(0); cin.tie(0); ll n; cin >> n; bool is = true; repsqrt(i,n){ if(n%i==0 && ( !is_prime(i) && i != 1))is = false; } if(is){out("NO");} else{out("YES");} return 0; }