#include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define mp make_pair #define pb push_back #define all(x) (x).begin(),(x).end() #define rep(i,n) for(int i=0;i<(n);i++) using namespace std; typedef long long ll; typedef unsigned long long ull; typedef vector vb; typedef vector vi; typedef vector vvb; typedef vector vvi; typedef pair pii; const int INF=1<<29; const double EPS=1e-9; const int dx[]={1,0,-1,0,1,1,-1,-1},dy[]={0,-1,0,1,1,-1,-1,1}; int main() { string s; cin >> s; if (s == "0") { cout << "0" << endl; } else { cout << s << "0" << endl; } return 0; }