#include <vector>
#include <string>
#include <algorithm>
#include <numeric>
#include <iostream>
#include <fstream>
#include <queue>
#include <cstring>
using namespace std;

using ll = long long;
using ull = unsigned long long;

using P = pair<ll,ll>;

int main()
{
  int n;
  cin >> n;

  if(n & 1)
  {
    n-= 3;
    cout << 7;

    for(int i = n; i >0; i-=2)
      cout << 1;
  }
  else
  {
    for(int i = n; i >0; i-=2)
      cout << 1;
  }

  cout << endl;
}