#include <atcoder/all>
#include <bits/stdc++.h>
using namespace std;
using namespace atcoder;

#define MOD 1000000007
#define MOD99 998244353

int main()
{
    int n;
    cin >> n;
    if(n == 0)cout << 0 << endl;
    else{
        cout << "010";
        for(int i = 1;i < n;i++){
            cout << "0";
        }
        cout << endl;
    }
}