#include <iostream>
#include<bits/stdc++.h>
using namespace std;
int main() {
// your code goes here
int n;
cin>>n;
vector<int>arr;
int temp;
for(int i=0;i<n;i++)
{
arr.push_back(temp);
}
for(int i=0;i<arr.size();i++)
{
if(arr[i]-arr[i+1]>1)
{
int diff=arr[i+1]-arr[i];
for(int j=diff;j<=1;j++)
{
cout<<arr[i]+1;
}
}
}
return 0;
}
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