#include<bits/stdc++.h>
using namespace std;
#define lo long long
#define sr string
#define ch char
#define ve vector
#define al(x) x.begin(),x.end()
#define rep(i,a) for(int i=0;i<a;i++)
#define rrep(i,a,b) for(int i=a;i<b;i++)
#define rrrep(i,a,b) for(int i=a;i>=b;i--)
#define wh while

int main(){
    sr S;
    cin>>S;
    cout<<S<<'0'<<endl;
}