#include using namespace std; //using Graph = vector>; using dou =long double; string yes="yes"; string Yes="Yes"; string YES="YES"; string no="no"; string No="No"; string NO="NO"; template inline bool chmax(T& a, T b) { if (a < b) { a = b; return true; } return false; } template inline bool chmin(T& a, T b) { if (a > b) { a = b; return true; } return false; } #define rep(i, n) for(int i = 0; i < (int)(n); i++) #define brep(n) for(int bit=0;bit<(1<= (int)0; i--) #define rrep(i,m,n) for(ll i = m; i < (ll)(n); i++) #define reprep(i,j,h,w) rep(i,h)rep(j,w) #define all(x) (x).begin(),(x).end() #define VEC(type,name,n) std::vector name(n);rep(i,n)std::cin >> name[i]; #define pb push_back #define pf push_front #define query int qq;std::cin >> qq;rep(qqq,qq) #define lb lower_bound #define ub upper_bound #define fi first #define se second #define itn int #define mp make_pair #define sum(a) accumulate(all(a),0ll) #define keta fixed< > name(m,vector (n,a)) //#define vvector(name,typ,m,n)vector > name(m,vector (n)) #define vvvector(name,t,l,m,n,a) vector > > name(l, vector >(m, vector(n,a))); #define vvvvector(name,t,k,l,m,n,a) vector > > > name(k,vector > >(l, vector >(m, vector(n,a)) )); #define case std::cout <<"Case #" < P; typedef pair PL; //typedef long long T; ll ceil(ll a,ll b){ return ((a+b-1)/b); } const int INF = 2000000000; const ll INF64 = 9223372036854775807ll; const ll MOD = 1000000007ll; const dou pi=3.141592653589793; //mapは、if関数などで覗いただけで構成されるので注意しよう! //std::vector> g; //std::vector> g; map< ll, int > prime_factor(ll n) {//素因数分解 map< ll, int > ret; for(ll i = 2; i * i <= n; i++) { while(n % i == 0) { ret[i]++; n /= i; } } if(n != 1) ret[n] = 1; return ret; } int main(){ int n; std::cin >> n; std::map a=prime_factor(n); ll ans=1; erep(i,a){ if(i.se%2==1){ ans*=i.fi; } } std::cout <