#include <algorithm>
#include <climits>
#include <cstdlib>
#include <vector>
#include <cctype>
#include <deque>
#include <cmath>
#include <queue>
#include <map>
#include <set>
#include <ctime>
#include <stack>
#include <cstdio>
#include <string>
#include <iomanip>
#include <cstring>
#include <iostream>
#include <functional>

using namespace std;

typedef long long ll;


#define LLMAX LLONG_MAX
#define IMAX INT_MAX


int main() {
  int n;
  cin >> n;
  if (n >= 3 && n%2) {
    cout << "7";
    n -= 3;
  }
  for (int i = 0; i < n/2; i++) {
    cout << "1";
  }
  cout << endl;
}