#include <iostream>
using namespace std;
int main(int argc, char** argv) {
  int n;
  cin >> n;
  int one = 0, seven = 0;
  if (n % 2 != 0) {
    seven = 1;
    one = n / 2 - 1;
  } else {
    one = n / 2;
  }
  if (seven == 1) cout << "7";
  for (int i = 0; i < one; i++) cout << "1";
  cout << endl;
  return 0;
}