#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using vll=vector<long long>;
template<typename T>T get(){T r;cin>>r;return r;}
template<typename T>vector<T> get_v(ll n){vector<T> v;for(int i=0;i!=n;i++){v.push_back(get<T>());};return v;}
template<typename T>void show_v(vector<T> v){for(auto &i:v){cout<<i<<" ";}cout<<""<<endl;}

int main() {
    int n=get<int>();
    cout<<10*n<<endl;

    system("pause");
}