#include<iostream>

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

using namespace std;

int main(){
  int N;
  cin >> N;
  if (N % 2) {
    cout << 7 ;
    N -= 3;
  }
  REP(i, 0, N / 2) {
    cout << 1;  
  }
  cout << endl;
  return 0;
}