#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using ll = long long;
using ld = long double;

int N;
int digit[10] = {6, 2, 5, 5, 4, 5, 6, 3, 7, 6};

int main() {
  cin >> N;
  if (N == 3) cout << 7 << endl;
  else {
    N /= 2;
    cout << string(N, '1') << endl;
  }
  return 0;
}