#include<bits/stdc++.h>
using namespace std;
using Int = long long;
//INSERT ABOVE HERE
signed main(){
  Int n;
  cin>>n;
  while(n){
    if(n==3){
      cout<<7;
      break;
    }
    cout<<1;
    n-=2;
  }
  cout<<endl;
  return 0;
}