#include using namespace std; #define all(vec) vec.begin(),vec.end() typedef long long int ll; typedef pair P; const ll MOD=1000000007; const ll INF=1000000010; const ll LINF=4000000000000000010LL; const int MAX=310; const double EPS=1e-9; int dx[4]={0,1,0,-1}; int dy[4]={1,0,-1,0}; ll ncr(ll n,ll r){ ll f=1; for(int i=1;i<=n;i++){ f*=i; } ll ff=1; for(int i=1;i<=r;i++){ ff*=i; } ll fff=1; for(int i=1;i<=n-r;i++){ fff*=i; } return f/(ff*fff); } int main(){ ll n;cin>>n; ll t=1; int a=0,b=0; if(n==0){ cout<<1<