#include<bits/stdc++.h>

using namespace std;
using ll = long long;


int main()
{
    int N; cin >> N;
    if(N == 0) {cout << 1 << endl; return 0;}

    string s = "010";
    for(int i = 1; i < N; i++)s.push_back('0');
    cout << s << endl;
}