#include <bits/stdc++.h>

using namespace std;

#define REP(i,a,b) for(int i=a;i<(int)b;i++)
#define rep(i,n) REP(i,0,n)

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

int main() {
  
  int N; cin >> N;
  if(N == 2) {
    cout << 1 << endl;
  }
  else if(N == 3) {
    cout << 7 << endl;
  }
  else {
    string s;
    int k = N / 3;
    rep(i, k) {
      s+="7";
    }
    N -= k*3;
    int l = N / 2;
    rep(i, l) {
      s+="1";
    }
    cout << s << endl;
  }
  
  return 0;
}