#include<bits/stdc++.h>
using namespace std;

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