#include<bits/stdc++.h>

using namespace std;
using ll=long long;
#define rep2(i, a, n) for(int i = (a); i < (n); i++)
#define rep(i, n) rep2(i,0,n)

void out(){cout<<endl;} template<typename Head,typename... Tail> void out(Head&& head,Tail&&... tail){cout<<head<<" ";out(forward<Tail>(tail)...);}

int main(){
  cin.tie(nullptr);ios_base::sync_with_stdio(false);
  int n;
  cin>>n;
  if(n%2==1){
    cout<<7;
    n-=3;
    rep(i,n/2){
      cout<<1;
    }
    cout<<'\n';
  }else{
    rep(i,n/2){
      cout<<1;
    }
    cout<<'\n';
  }
}